231030440 has 32 divisors (see below), whose sum is σ = 521912160. Its totient is φ = 92040000.

The previous prime is 231030433. The next prime is 231030463. The reversal of 231030440 is 44030132.

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, 1466 + ... + 21545.

It is an arithmetic number, because the mean of its divisors is an integer number (16309755).

Almost surely, 2^231030440 is an apocalyptic number.

231030440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231030440 is an abundant number, since it is smaller than the sum of its proper divisors (290881720).

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

231030440 is a wasteful number, since it uses less digits than its factorization.

231030440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23273 (or 23269 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 231030440 is about 15199.6855230626. The cubic root of 231030440 is about 613.6061942286.

Adding to 231030440 its reverse (44030132), we get a palindrome (275060572).

The spelling of 231030440 in words is "two hundred thirty-one million, thirty thousand, four hundred forty".