55561570 has 16 divisors (see below), whose sum is σ = 100566648. Its totient is φ = 22101120.

The previous prime is 55561549. The next prime is 55561573. The reversal of 55561570 is 7516555.

It can be written as a sum of positive squares in 4 ways, for example, as 13920361 + 41641209 = 3731^2 + 6453^2 .

It is not an unprimeable number, because it can be changed into a prime (55561573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13539 + ... + 17158.

Almost surely, 2^55561570 is an apocalyptic number.

55561570 is a deficient number, since it is larger than the sum of its proper divisors (45005078).

55561570 is a wasteful number, since it uses less digits than its factorization.

55561570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30885.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 55561570 is about 7453.9633752790. The cubic root of 55561570 is about 381.5851833280.

The spelling of 55561570 in words is "fifty-five million, five hundred sixty-one thousand, five hundred seventy".