231406542252 has 60 divisors (see below), whose sum is σ = 609294633640. Its totient is φ = 76580567424.

The previous prime is 231406542251. The next prime is 231406542259. The reversal of 231406542252 is 252245604132.

231406542252 is a `hidden beast` number, since 23 + 1 + 40 + 6 + 542 + 2 + 52 = 666.

It is a super-4 number, since 4×231406542252⁴ (a number of 47 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (231406542251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2524093 + ... + 2614164.

Almost surely, 2^231406542252 is an apocalyptic number.

It is an amenable number.

231406542252 is an abundant number, since it is smaller than the sum of its proper divisors (377888091388).

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

231406542252 is a wasteful number, since it uses less digits than its factorization.

231406542252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138412 (or 5138401 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 231406542252 in words is "two hundred thirty-one billion, four hundred six million, five hundred forty-two thousand, two hundred fifty-two".