55131560 has 32 divisors (see below), whose sum is σ = 135324000. Its totient is φ = 20047680.

The previous prime is 55131551. The next prime is 55131563. The reversal of 55131560 is 6513155.

55131560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55131563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62210 + ... + 63089.

It is an arithmetic number, because the mean of its divisors is an integer number (4228875).

Almost surely, 2^55131560 is an apocalyptic number.

It is an amenable number.

55131560 is an abundant number, since it is smaller than the sum of its proper divisors (80192440).

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

55131560 is a wasteful number, since it uses less digits than its factorization.

55131560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125321 (or 125317 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 55131560 is about 7425.0629626960. The cubic root of 55131560 is about 380.5982267040.

The spelling of 55131560 in words is "fifty-five million, one hundred thirty-one thousand, five hundred sixty".