55231513040 has 80 divisors (see below), whose sum is σ = 142383851136. Its totient is φ = 19754918400.

The previous prime is 55231512983. The next prime is 55231513067. The reversal of 55231513040 is 4031513255.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 55231512994 and 55231513012.

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, 460772 + ... + 568131.

Almost surely, 2^55231513040 is an apocalyptic number.

It is an amenable number.

55231513040 is an abundant number, since it is smaller than the sum of its proper divisors (87152338096).

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

55231513040 is a wasteful number, since it uses less digits than its factorization.

55231513040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028988 (or 1028982 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 55231513040 in words is "fifty-five billion, two hundred thirty-one million, five hundred thirteen thousand, forty".