231309402 has 8 divisors (see below), whose sum is σ = 462618816. Its totient is φ = 77103132.

The previous prime is 231309391. The next prime is 231309431. The reversal of 231309402 is 204903132.

231309402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

231309402 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19275778 + ... + 19275789.

It is an arithmetic number, because the mean of its divisors is an integer number (57827352).

Almost surely, 2^231309402 is an apocalyptic number.

231309402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231309402 is a wasteful number, since it uses less digits than its factorization.

231309402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38551572.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231309402 is about 15208.8593260639. The cubic root of 231309402 is about 613.8530649614.

The spelling of 231309402 in words is "two hundred thirty-one million, three hundred nine thousand, four hundred two".