55213520131 has 16 divisors (see below), whose sum is σ = 68846254848. Its totient is φ = 43018135200.

The previous prime is 55213520119. The next prime is 55213520171. The reversal of 55213520131 is 13102531255.

It is a cyclic number.

It is not a de Polignac number, because 55213520131 - 2¹³ = 55213511939 is a prime.

It is a super-2 number, since 2×55213520131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55213520131.

It is not an unprimeable number, because it can be changed into a prime (55213520111) 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, 641836 + ... + 722758.

It is an arithmetic number, because the mean of its divisors is an integer number (4302890928).

Almost surely, 2^55213520131 is an apocalyptic number.

55213520131 is a deficient number, since it is larger than the sum of its proper divisors (13632734717).

55213520131 is a wasteful number, since it uses less digits than its factorization.

55213520131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89802.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 55213520131 in words is "fifty-five billion, two hundred thirteen million, five hundred twenty thousand, one hundred thirty-one".