231312202 has 32 divisors (see below), whose sum is σ = 386394624. Its totient is φ = 102975600.

The previous prime is 231312187. The next prime is 231312203. The reversal of 231312202 is 202213132.

231312202 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231312203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238723 + ... + 239689.

It is an arithmetic number, because the mean of its divisors is an integer number (12074832).

Almost surely, 2^231312202 is an apocalyptic number.

231312202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231312202 is a deficient number, since it is larger than the sum of its proper divisors (155082422).

231312202 is a wasteful number, since it uses less digits than its factorization.

231312202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231312202 is about 15208.9513773961. The cubic root of 231312202 is about 613.8555418482.

Adding to 231312202 its reverse (202213132), we get a palindrome (433525334).

The spelling of 231312202 in words is "two hundred thirty-one million, three hundred twelve thousand, two hundred two".