55111535231 has 4 divisors (see below), whose sum is σ = 55441544592. Its totient is φ = 54781525872.

The previous prime is 55111535207. The next prime is 55111535287. The reversal of 55111535231 is 13253511155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13253511155 = 5 ⋅2650702231.

It is a cyclic number.

It is not a de Polignac number, because 55111535231 - 2²² = 55107340927 is a prime.

It is a super-2 number, since 2×55111535231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111135231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165004430 + ... + 165004763.

It is an arithmetic number, because the mean of its divisors is an integer number (13860386148).

Almost surely, 2^55111535231 is an apocalyptic number.

55111535231 is a deficient number, since it is larger than the sum of its proper divisors (330009361).

55111535231 is a wasteful number, since it uses less digits than its factorization.

55111535231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330009360.

The product of its digits is 11250, while the sum is 32.

The spelling of 55111535231 in words is "fifty-five billion, one hundred eleven million, five hundred thirty-five thousand, two hundred thirty-one".