231550510145525 has 12 divisors (see below), whose sum is σ = 294882703732452. Its totient is φ = 180233910599040.

The previous prime is 231550510145509. The next prime is 231550510145533. The reversal of 231550510145525 is 525541015055132.

It can be written as a sum of positive squares in 6 ways, for example, as 34225389961009 + 197325120184516 = 5850247^2 + 14047246^2 .

It is not a de Polignac number, because 231550510145525 - 2⁴ = 231550510145509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125162436992 + ... + 125162438841.

It is an arithmetic number, because the mean of its divisors is an integer number (24573558644371).

Almost surely, 2^{231550510145525} is an apocalyptic number.

231550510145525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231550510145525 is a deficient number, since it is larger than the sum of its proper divisors (63332193586927).

231550510145525 is a wasteful number, since it uses less digits than its factorization.

231550510145525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250324875880 (or 250324875875 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 44.

The spelling of 231550510145525 in words is "two hundred thirty-one trillion, five hundred fifty billion, five hundred ten million, one hundred forty-five thousand, five hundred twenty-five".