231265519440 has 40 divisors (see below), whose sum is σ = 716923111008. Its totient is φ = 61670805120.

The previous prime is 231265519423. The next prime is 231265519469. The reversal of 231265519440 is 44915562132.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 231265519392 and 231265519401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481802926 + ... + 481803405.

Almost surely, 2^231265519440 is an apocalyptic number.

231265519440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231265519440 is an abundant number, since it is smaller than the sum of its proper divisors (485657591568).

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

231265519440 is a wasteful number, since it uses less digits than its factorization.

231265519440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963606347 (or 963606341 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 231265519440 in words is "two hundred thirty-one billion, two hundred sixty-five million, five hundred nineteen thousand, four hundred forty".