55515051 has 12 divisors (see below), whose sum is σ = 83158712. Its totient is φ = 37009872.

The previous prime is 55515041. The next prime is 55515067. The reversal of 55515051 is 15051555.

It is not a de Polignac number, because 55515051 - 2⁹ = 55514539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55515001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113986 + ... + 114471.

Almost surely, 2^55515051 is an apocalyptic number.

55515051 is a deficient number, since it is larger than the sum of its proper divisors (27643661).

55515051 is an equidigital number, since it uses as much as digits as its factorization.

55515051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228472 (or 228460 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The square root of 55515051 is about 7450.8423013777. The cubic root of 55515051 is about 381.4786593556.

The spelling of 55515051 in words is "fifty-five million, five hundred fifteen thousand, fifty-one".