1231552372240 has 40 divisors (see below), whose sum is σ = 2863439775000. Its totient is φ = 492607097856.

The previous prime is 1231552372229. The next prime is 1231552372279. The reversal of 1231552372240 is 422732551321.

It can be written as a sum of positive squares in 4 ways, for example, as 9209857024 + 1222342515216 = 95968^2 + 1105596^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1231552372240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2930886 + ... + 3324634.

It is an arithmetic number, because the mean of its divisors is an integer number (71585994375).

Almost surely, 2^{1231552372240} is an apocalyptic number.

1231552372240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231552372240 is an abundant number, since it is smaller than the sum of its proper divisors (1631887402760).

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

1231552372240 is a wasteful number, since it uses less digits than its factorization.

1231552372240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432859 (or 432853 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 1231552372240 in words is "one trillion, two hundred thirty-one billion, five hundred fifty-two million, three hundred seventy-two thousand, two hundred forty".