231002312 has 8 divisors (see below), whose sum is σ = 433129350. Its totient is φ = 115501152.

The previous prime is 231002281. The next prime is 231002329. The reversal of 231002312 is 213200132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 192487876 + 38514436 = 13874^2 + 6206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437637 + ... + 14437652.

Almost surely, 2^231002312 is an apocalyptic number.

It is an amenable number.

231002312 is a deficient number, since it is larger than the sum of its proper divisors (202127038).

231002312 is a wasteful number, since it uses less digits than its factorization.

231002312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28875295 (or 28875291 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231002312 is about 15198.7602125963. The cubic root of 231002312 is about 613.5812909943.

Adding to 231002312 its reverse (213200132), we get a palindrome (444202444).

The spelling of 231002312 in words is "two hundred thirty-one million, two thousand, three hundred twelve".