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30422213 = 142721319
BaseRepresentation
bin111010000001…
…1010011000101
32010020121102122
41310003103011
530242002323
63004015325
7516404333
oct164032305
963217378
1030422213
1116199728
12a231545
1363c2213
14407cb53
152a0dec8
hex1d034c5

30422213 has 4 divisors (see below), whose sum is σ = 30444960. Its totient is φ = 30399468.

The previous prime is 30422201. The next prime is 30422219. The reversal of 30422213 is 31222403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31222403 = 160719429.

It is a cyclic number.

It is not a de Polignac number, because 30422213 - 222 = 26227909 is a prime.

It is a super-2 number, since 2×304222132 = 1851022087634738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30422191 and 30422200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30422219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9233 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (7611240).

Almost surely, 230422213 is an apocalyptic number.

It is an amenable number.

30422213 is a deficient number, since it is larger than the sum of its proper divisors (22747).

30422213 is a wasteful number, since it uses less digits than its factorization.

30422213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22746.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30422213 is about 5515.6335084920. The cubic root of 30422213 is about 312.1741473823.

Adding to 30422213 its reverse (31222403), we get a palindrome (61644616).

The spelling of 30422213 in words is "thirty million, four hundred twenty-two thousand, two hundred thirteen".

Divisors: 1 1427 21319 30422213