123531551210525 has 12 divisors (see below), whose sum is σ = 153197541352212. Its totient is φ = 98813358483840.

The previous prime is 123531551210497. The next prime is 123531551210527. The reversal of 123531551210525 is 525012155135321.

It can be written as a sum of positive squares in 6 ways, for example, as 18056966923801 + 105474584286724 = 4249349^2 + 10270082^2 .

It is not a de Polignac number, because 123531551210525 - 2⁸ = 123531551210269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123531551210527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296850032 + ... + 297265881.

It is an arithmetic number, because the mean of its divisors is an integer number (12766461779351).

Almost surely, 2^{123531551210525} is an apocalyptic number.

It is an amenable number.

123531551210525 is a deficient number, since it is larger than the sum of its proper divisors (29665990141687).

123531551210525 is an equidigital number, since it uses as much as digits as its factorization.

123531551210525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594124240 (or 594124235 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 41.

The spelling of 123531551210525 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred fifty-one million, two hundred ten thousand, five hundred twenty-five".