231452140 has 24 divisors (see below), whose sum is σ = 491909040. Its totient is φ = 91464768.

The previous prime is 231452099. The next prime is 231452149. The reversal of 231452140 is 41254132.

It is a super-2 number, since 2×231452140² = 107140186221159200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231452149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68055 + ... + 71374.

It is an arithmetic number, because the mean of its divisors is an integer number (20496210).

Almost surely, 2^231452140 is an apocalyptic number.

231452140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231452140 is an abundant number, since it is smaller than the sum of its proper divisors (260456900).

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

231452140 is a wasteful number, since it uses less digits than its factorization.

231452140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139521 (or 139519 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 231452140 is about 15213.5511962198. The cubic root of 231452140 is about 613.9793058911.

The spelling of 231452140 in words is "two hundred thirty-one million, four hundred fifty-two thousand, one hundred forty".