231267520 has 56 divisors (see below), whose sum is σ = 600779088. Its totient is φ = 84096000.

The previous prime is 231267503. The next prime is 231267521. The reversal of 231267520 is 25762132.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (231267521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29331 + ... + 36370.

It is an arithmetic number, because the mean of its divisors is an integer number (10728198).

Almost surely, 2^231267520 is an apocalyptic number.

231267520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231267520 is an abundant number, since it is smaller than the sum of its proper divisors (369511568).

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

231267520 is a wasteful number, since it uses less digits than its factorization.

231267520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65729 (or 65719 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 231267520 is about 15207.4823688867. The cubic root of 231267520 is about 613.8160136560.

The spelling of 231267520 in words is "two hundred thirty-one million, two hundred sixty-seven thousand, five hundred twenty".