2531213113128 has 48 divisors (see below), whose sum is σ = 7361180995680. Its totient is φ = 723203746272.

The previous prime is 2531213113109. The next prime is 2531213113139. The reversal of 2531213113128 is 8213113121352.

It is a happy number.

It is a super-2 number, since 2×2531213113128² (a number of 26 digits) contains 22 as substring.

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, 1076194876 + ... + 1076197227.

It is an arithmetic number, because the mean of its divisors is an integer number (153357937410).

Almost surely, 2^{2531213113128} is an apocalyptic number.

2531213113128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2531213113128 is an abundant number, since it is smaller than the sum of its proper divisors (4829967882552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2531213113128 is a wasteful number, since it uses less digits than its factorization.

2531213113128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152392126 (or 2152392115 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The spelling of 2531213113128 in words is "two trillion, five hundred thirty-one billion, two hundred thirteen million, one hundred thirteen thousand, one hundred twenty-eight".