231401512 has 8 divisors (see below), whose sum is σ = 433877850. Its totient is φ = 115700752.

The previous prime is 231401497. The next prime is 231401537. The reversal of 231401512 is 215104132.

It can be written as a sum of positive squares in only one way, i.e., 226622916 + 4778596 = 15054^2 + 2186^2 .

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

It is a super-2 number, since 2×231401512² = 107093319511772288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231401512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14462587 + ... + 14462602.

Almost surely, 2^231401512 is an apocalyptic number.

It is an amenable number.

231401512 is a deficient number, since it is larger than the sum of its proper divisors (202476338).

231401512 is a wasteful number, since it uses less digits than its factorization.

231401512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28925195 (or 28925191 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 231401512 is about 15211.8871939020. The cubic root of 231401512 is about 613.9345352083.

Adding to 231401512 its reverse (215104132), we get a palindrome (446505644).

The spelling of 231401512 in words is "two hundred thirty-one million, four hundred one thousand, five hundred twelve".