231513450311240 has 64 divisors (see below), whose sum is σ = 530787941798400. Its totient is φ = 90864956397312.

The previous prime is 231513450311233. The next prime is 231513450311249. The reversal of 231513450311240 is 42113054315132.

It is a self number, because there is not a number n which added to its sum of digits gives 231513450311240.

It is not an unprimeable number, because it can be changed into a prime (231513450311249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257315072 + ... + 258213231.

It is an arithmetic number, because the mean of its divisors is an integer number (8293561590600).

Almost surely, 2^{231513450311240} is an apocalyptic number.

231513450311240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231513450311240 is an abundant number, since it is smaller than the sum of its proper divisors (299274491487160).

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

231513450311240 is a wasteful number, since it uses less digits than its factorization.

231513450311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515528526 (or 515528522 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 231513450311240 in words is "two hundred thirty-one trillion, five hundred thirteen billion, four hundred fifty million, three hundred eleven thousand, two hundred forty".