231139958040 has 384 divisors, whose sum is σ = 820587568320. Its totient is φ = 56202854400.

The previous prime is 231139958029. The next prime is 231139958053. The reversal of 231139958040 is 40859931132.

It is a happy number.

231139958040 is a `hidden beast` number, since 2 + 31 + 1 + 39 + 9 + 580 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25007820 + ... + 25017060.

Almost surely, 2^231139958040 is an apocalyptic number.

231139958040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231139958040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410293784160).

231139958040 is an abundant number, since it is smaller than the sum of its proper divisors (589447610280).

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

231139958040 is a wasteful number, since it uses less digits than its factorization.

231139958040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9403 (or 9396 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 231139958040 in words is "two hundred thirty-one billion, one hundred thirty-nine million, nine hundred fifty-eight thousand, forty".