55087131 has 16 divisors (see below), whose sum is σ = 80880768. Its totient is φ = 33072000.

The previous prime is 55087127. The next prime is 55087133. The reversal of 55087131 is 13178055.

It is not a de Polignac number, because 55087131 - 2² = 55087127 is a prime.

It is a super-2 number, since 2×55087131² = 6069184003622322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55087133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4270 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (5055048).

Almost surely, 2^55087131 is an apocalyptic number.

55087131 is a deficient number, since it is larger than the sum of its proper divisors (25793637).

55087131 is a wasteful number, since it uses less digits than its factorization.

55087131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15722.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 55087131 is about 7422.0705332138. The cubic root of 55087131 is about 380.4959613653.

The spelling of 55087131 in words is "fifty-five million, eighty-seven thousand, one hundred thirty-one".