231045515540 has 48 divisors (see below), whose sum is σ = 559416436992. Its totient is φ = 78514576896.

The previous prime is 231045515539. The next prime is 231045515573. The reversal of 231045515540 is 45515540132.

It is a super-2 number, since 2×231045515540² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 231045515540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7286504 + ... + 7318143.

It is an arithmetic number, because the mean of its divisors is an integer number (11654509104).

Almost surely, 2^231045515540 is an apocalyptic number.

231045515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231045515540 is an abundant number, since it is smaller than the sum of its proper divisors (328370921452).

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

231045515540 is a wasteful number, since it uses less digits than its factorization.

231045515540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14604776 (or 14604774 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 231045515540 in words is "two hundred thirty-one billion, forty-five million, five hundred fifteen thousand, five hundred forty".