[go: up one dir, main page]

Search a number
-
+
442423031 = 991446441
BaseRepresentation
bin11010010111101…
…101011011110111
31010211111102022012
4122113231123313
51401230014111
6111522354435
713651351031
oct3227553367
91124442265
10442423031
11207810a76
121041bba1b
1370875c9b
1442a88c51
1528c9348b
hex1a5ed6f7

442423031 has 4 divisors (see below), whose sum is σ = 442870464. Its totient is φ = 441975600.

The previous prime is 442423027. The next prime is 442423039. The reversal of 442423031 is 130324244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442423031 - 22 = 442423027 is a prime.

It is a super-2 number, since 2×4424230312 = 391476276718453922, 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 = 442422988 and 442423006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442423039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222230 + ... + 224211.

It is an arithmetic number, because the mean of its divisors is an integer number (110717616).

Almost surely, 2442423031 is an apocalyptic number.

442423031 is a deficient number, since it is larger than the sum of its proper divisors (447433).

442423031 is an equidigital number, since it uses as much as digits as its factorization.

442423031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447432.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 442423031 is about 21033.8544018922. The cubic root of 442423031 is about 761.9840995068.

Adding to 442423031 its reverse (130324244), we get a palindrome (572747275).

The spelling of 442423031 in words is "four hundred forty-two million, four hundred twenty-three thousand, thirty-one".

Divisors: 1 991 446441 442423031