56643279 has 16 divisors (see below), whose sum is σ = 94160640. Its totient is φ = 29424960.

The previous prime is 56643259. The next prime is 56643281. The reversal of 56643279 is 97234665.

It is not a de Polignac number, because 56643279 - 2⁸ = 56643023 is a prime.

It is a super-2 number, since 2×56643279² = 6416922111743682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56643279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56643229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122374 + ... + 122835.

It is an arithmetic number, because the mean of its divisors is an integer number (5885040).

Almost surely, 2^56643279 is an apocalyptic number.

56643279 is a deficient number, since it is larger than the sum of its proper divisors (37517361).

56643279 is a wasteful number, since it uses less digits than its factorization.

56643279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245230.

The product of its digits is 272160, while the sum is 42.

The square root of 56643279 is about 7526.1729318426. The cubic root of 56643279 is about 384.0456014095.

The spelling of 56643279 in words is "fifty-six million, six hundred forty-three thousand, two hundred seventy-nine".