231436642 has 4 divisors (see below), whose sum is σ = 347154966. Its totient is φ = 115718320.

The previous prime is 231436609. The next prime is 231436661. The reversal of 231436642 is 246634132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 214944921 + 16491721 = 14661^2 + 4061^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57859159 + ... + 57859162.

Almost surely, 2^231436642 is an apocalyptic number.

231436642 is a deficient number, since it is larger than the sum of its proper divisors (115718324).

231436642 is a wasteful number, since it uses less digits than its factorization.

231436642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115718323.

The product of its digits is 20736, while the sum is 31.

The square root of 231436642 is about 15213.0418391589. The cubic root of 231436642 is about 613.9656015983.

The spelling of 231436642 in words is "two hundred thirty-one million, four hundred thirty-six thousand, six hundred forty-two".