55770531 has 8 divisors (see below), whose sum is σ = 75579984. Its totient is φ = 36570720.

The previous prime is 55770497. The next prime is 55770563. The reversal of 55770531 is 13507755.

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

It is not a de Polignac number, because 55770531 - 2⁹ = 55770019 is a prime.

It is a super-2 number, since 2×55770531² = 6220704256043922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55770492 and 55770501.

It is not an unprimeable number, because it can be changed into a prime (55770031) 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, 152196 + ... + 152561.

It is an arithmetic number, because the mean of its divisors is an integer number (9447498).

Almost surely, 2^55770531 is an apocalyptic number.

55770531 is a deficient number, since it is larger than the sum of its proper divisors (19809453).

55770531 is a wasteful number, since it uses less digits than its factorization.

55770531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304821.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 55770531 is about 7467.9669924284. The cubic root of 55770531 is about 382.0629516238.

The spelling of 55770531 in words is "fifty-five million, seven hundred seventy thousand, five hundred thirty-one".