231257620 has 36 divisors (see below), whose sum is σ = 533809332. Its totient is φ = 84092800.

The previous prime is 231257599. The next prime is 231257623. The reversal of 231257620 is 26752132.

It can be written as a sum of positive squares in 2 ways, for example, as 89075844 + 142181776 = 9438^2 + 11924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231257623) 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 11 ways as a sum of consecutive naturals, for example, 45361 + ... + 50200.

It is an arithmetic number, because the mean of its divisors is an integer number (14828037).

Almost surely, 2^231257620 is an apocalyptic number.

231257620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231257620 is an abundant number, since it is smaller than the sum of its proper divisors (302551712).

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

231257620 is a wasteful number, since it uses less digits than its factorization.

231257620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95592 (or 95579 counting only the distinct ones).

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

The square root of 231257620 is about 15207.1568677383. The cubic root of 231257620 is about 613.8072548741.

The spelling of 231257620 in words is "two hundred thirty-one million, two hundred fifty-seven thousand, six hundred twenty".