231024520 has 16 divisors (see below), whose sum is σ = 519805260. Its totient is φ = 92409792.

The previous prime is 231024517. The next prime is 231024539. The reversal of 231024520 is 25420132.

It can be written as a sum of positive squares in 2 ways, for example, as 226622916 + 4401604 = 15054^2 + 2098^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2887767 + ... + 2887846.

Almost surely, 2^231024520 is an apocalyptic number.

231024520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231024520 is an abundant number, since it is smaller than the sum of its proper divisors (288780740).

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

231024520 is a wasteful number, since it uses less digits than its factorization.

231024520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775624 (or 5775620 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 231024520 is about 15199.4907809439. The cubic root of 231024520 is about 613.6009531015.

Adding to 231024520 its reverse (25420132), we get a palindrome (256444652).

The spelling of 231024520 in words is "two hundred thirty-one million, twenty-four thousand, five hundred twenty".