231357630 has 64 divisors (see below), whose sum is σ = 649363968. Its totient is φ = 51649920.

The previous prime is 231357613. The next prime is 231357631. The reversal of 231357630 is 36753132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231357631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3781 + ... + 21840.

It is an arithmetic number, because the mean of its divisors is an integer number (10146312).

Almost surely, 2^231357630 is an apocalyptic number.

231357630 is an abundant number, since it is smaller than the sum of its proper divisors (418006338).

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

231357630 is a wasteful number, since it uses less digits than its factorization.

231357630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25681.

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 231357630 is about 15210.4447666727. Note that the first 3 decimals coincide. The cubic root of 231357630 is about 613.8957247756.

The spelling of 231357630 in words is "two hundred thirty-one million, three hundred fifty-seven thousand, six hundred thirty".