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30556051 = 132123131
BaseRepresentation
bin111010010001…
…1111110010011
32010111102000121
41310203332103
530310243201
63010531111
7520502461
oct164437623
963442017
1030556051
1116280239
12a296a97
13643b106
1440b5831
152a389a1
hex1d23f93

30556051 has 4 divisors (see below), whose sum is σ = 30580504. Its totient is φ = 30531600.

The previous prime is 30555977. The next prime is 30556081. The reversal of 30556051 is 15065503.

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 30556051 - 219 = 30031763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30556081) 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, 10245 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (7645126).

Almost surely, 230556051 is an apocalyptic number.

30556051 is a deficient number, since it is larger than the sum of its proper divisors (24453).

30556051 is a wasteful number, since it uses less digits than its factorization.

30556051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24452.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 30556051 is about 5527.7527983802. The cubic root of 30556051 is about 312.6312656008.

The spelling of 30556051 in words is "thirty million, five hundred fifty-six thousand, fifty-one".

Divisors: 1 1321 23131 30556051