55770520 has 32 divisors (see below), whose sum is σ = 135137520. Its totient is φ = 20592000.

The previous prime is 55770497. The next prime is 55770563. The reversal of 55770520 is 2507755.

It is a super-2 number, since 2×55770520² = 6220701802140800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent 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, 53106 + ... + 54145.

Almost surely, 2^55770520 is an apocalyptic number.

It is an amenable number.

55770520 is an abundant number, since it is smaller than the sum of its proper divisors (79367000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55770520 is a wasteful number, since it uses less digits than its factorization.

55770520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107275 (or 107271 counting only the distinct ones).

The product of its (nonzero) digits is 12250, while the sum is 31.

The square root of 55770520 is about 7467.9662559495. The cubic root of 55770520 is about 382.0629265049.

The spelling of 55770520 in words is "fifty-five million, seven hundred seventy thousand, five hundred twenty".