55115525121 has 32 divisors (see below), whose sum is σ = 80845257600. Its totient is φ = 33243786240.

The previous prime is 55115525099. The next prime is 55115525123. The reversal of 55115525121 is 12152551155.

It is not a de Polignac number, because 55115525121 - 2¹⁷ = 55115394049 is a prime.

It is a super-2 number, since 2×55115525121² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55115525123) 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 31 ways as a sum of consecutive naturals, for example, 257326 + ... + 420056.

It is an arithmetic number, because the mean of its divisors is an integer number (2526414300).

Almost surely, 2^55115525121 is an apocalyptic number.

55115525121 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55115525121 is a deficient number, since it is larger than the sum of its proper divisors (25729732479).

55115525121 is a wasteful number, since it uses less digits than its factorization.

55115525121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163009.

The product of its digits is 12500, while the sum is 33.

The spelling of 55115525121 in words is "fifty-five billion, one hundred fifteen million, five hundred twenty-five thousand, one hundred twenty-one".