55531131 has 16 divisors (see below), whose sum is σ = 77881344. Its totient is φ = 35126784.

The previous prime is 55531093. The next prime is 55531139. The reversal of 55531131 is 13113555.

It is not a de Polignac number, because 55531131 - 2¹⁰ = 55530107 is a prime.

It is a super-2 number, since 2×55531131² = 6167413020278322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55531139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5595 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (4867584).

Almost surely, 2^55531131 is an apocalyptic number.

55531131 is a deficient number, since it is larger than the sum of its proper divisors (22350213).

55531131 is a wasteful number, since it uses less digits than its factorization.

55531131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490.

The product of its digits is 1125, while the sum is 24.

The square root of 55531131 is about 7451.9212958807. The cubic root of 55531131 is about 381.5154877145.

Adding to 55531131 its reverse (13113555), we get a palindrome (68644686).

The spelling of 55531131 in words is "fifty-five million, five hundred thirty-one thousand, one hundred thirty-one".