231404632 has 8 divisors (see below), whose sum is σ = 433883700. Its totient is φ = 115702312.

The previous prime is 231404603. The next prime is 231404651. The reversal of 231404632 is 236404132.

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

It is a super-2 number, since 2×231404632² = 107096207422110848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231404597 and 231404606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14462782 + ... + 14462797.

Almost surely, 2^231404632 is an apocalyptic number.

It is an amenable number.

231404632 is a deficient number, since it is larger than the sum of its proper divisors (202479068).

231404632 is a wasteful number, since it uses less digits than its factorization.

231404632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28925585 (or 28925581 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 231404632 is about 15211.9897449347. The cubic root of 231404632 is about 613.9372944342.

Adding to 231404632 its reverse (236404132), we get a palindrome (467808764).

It can be divided in two parts, 23140 and 4632, that added together give a palindrome (27772).

The spelling of 231404632 in words is "two hundred thirty-one million, four hundred four thousand, six hundred thirty-two".