2155431145231 has 32 divisors (see below), whose sum is σ = 2707266329600. Its totient is φ = 1705214361312.

The previous prime is 2155431145199. The next prime is 2155431145249. The reversal of 2155431145231 is 1325411345512.

It is not a de Polignac number, because 2155431145231 - 2⁵ = 2155431145199 is a prime.

It is a super-2 number, since 2×2155431145231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155431145031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55017856 + ... + 55057018.

It is an arithmetic number, because the mean of its divisors is an integer number (84602072800).

Almost surely, 2^{2155431145231} is an apocalyptic number.

2155431145231 is a deficient number, since it is larger than the sum of its proper divisors (551835184369).

2155431145231 is a wasteful number, since it uses less digits than its factorization.

2155431145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51540 (or 51526 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The spelling of 2155431145231 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-one million, one hundred forty-five thousand, two hundred thirty-one".