56561555 has 8 divisors (see below), whose sum is σ = 69452592. Its totient is φ = 44196768.

The previous prime is 56561521. The next prime is 56561563. The reversal of 56561555 is 55516565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56561555 - 2¹⁶ = 56496019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131324 + ... + 131753.

It is an arithmetic number, because the mean of its divisors is an integer number (8681574).

Almost surely, 2^56561555 is an apocalyptic number.

56561555 is a deficient number, since it is larger than the sum of its proper divisors (12891037).

56561555 is a wasteful number, since it uses less digits than its factorization.

56561555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263125.

The product of its digits is 112500, while the sum is 38.

The square root of 56561555 is about 7520.7416522574. The cubic root of 56561555 is about 383.8608142664.

The spelling of 56561555 in words is "fifty-six million, five hundred sixty-one thousand, five hundred fifty-five".