231142280 has 32 divisors (see below), whose sum is σ = 521294400. Its totient is φ = 92239296.

The previous prime is 231142259. The next prime is 231142339. The reversal of 231142280 is 82241132.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10979 + ... + 24141.

It is an arithmetic number, because the mean of its divisors is an integer number (16290450).

Almost surely, 2^231142280 is an apocalyptic number.

231142280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231142280 is an abundant number, since it is smaller than the sum of its proper divisors (290152120).

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

231142280 is a wasteful number, since it uses less digits than its factorization.

231142280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613 (or 13609 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 231142280 is about 15203.3641014086. The cubic root of 231142280 is about 613.7051922164.

The spelling of 231142280 in words is "two hundred thirty-one million, one hundred forty-two thousand, two hundred eighty".