55131510 has 64 divisors (see below), whose sum is σ = 160123392. Its totient is φ = 11859456.

The previous prime is 55131509. The next prime is 55131541. The reversal of 55131510 is 1513155.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4152 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (2501928).

Almost surely, 2^55131510 is an apocalyptic number.

55131510 is an abundant number, since it is smaller than the sum of its proper divisors (104991882).

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

55131510 is a wasteful number, since it uses less digits than its factorization.

55131510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15477.

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 55131510 is about 7425.0595957204. The cubic root of 55131510 is about 380.5981116464.

Adding to 55131510 its reverse (1513155), we get a palindrome (56644665).

The spelling of 55131510 in words is "fifty-five million, one hundred thirty-one thousand, five hundred ten".