56557069 has 4 divisors (see below), whose sum is σ = 59016096. Its totient is φ = 54098044.

The previous prime is 56557063. The next prime is 56557087. The reversal of 56557069 is 96075565.

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.

It is a cyclic number.

It is not a de Polignac number, because 56557069 - 2¹¹ = 56555021 is a prime.

It is a super-2 number, since 2×56557069² = 6397404107741522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56557063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229479 + ... + 1229524.

It is an arithmetic number, because the mean of its divisors is an integer number (14754024).

Almost surely, 2^56557069 is an apocalyptic number.

It is an amenable number.

56557069 is a deficient number, since it is larger than the sum of its proper divisors (2459027).

56557069 is a wasteful number, since it uses less digits than its factorization.

56557069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459026.

The product of its (nonzero) digits is 283500, while the sum is 43.

The square root of 56557069 is about 7520.4434044809. The cubic root of 56557069 is about 383.8506657645.

The spelling of 56557069 in words is "fifty-six million, five hundred fifty-seven thousand, sixty-nine".