231147402 has 24 divisors (see below), whose sum is σ = 491091936. Its totient is φ = 72516288.

The previous prime is 231147391. The next prime is 231147437. The reversal of 231147402 is 204741132.

It is a happy number.

231147402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64918 + ... + 68385.

It is an arithmetic number, because the mean of its divisors is an integer number (20462164).

Almost surely, 2^231147402 is an apocalyptic number.

231147402 is an abundant number, since it is smaller than the sum of its proper divisors (259944534).

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

231147402 is a wasteful number, since it uses less digits than its factorization.

231147402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133342 (or 133325 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 231147402 is about 15203.5325500359. The cubic root of 231147402 is about 613.7097253186.

Adding to 231147402 its reverse (204741132), we get a palindrome (435888534).

The spelling of 231147402 in words is "two hundred thirty-one million, one hundred forty-seven thousand, four hundred two".