231660634 has 4 divisors (see below), whose sum is σ = 347490954. Its totient is φ = 115830316.

The previous prime is 231660631. The next prime is 231660679. The reversal of 231660634 is 436066132.

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., 184009225 + 47651409 = 13565^2 + 6903^2 .

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 a junction number, because it is equal to n+sod(n) for n = 231660596 and 231660605.

It is not an unprimeable number, because it can be changed into a prime (231660631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57915157 + ... + 57915160.

Almost surely, 2^231660634 is an apocalyptic number.

231660634 is a deficient number, since it is larger than the sum of its proper divisors (115830320).

231660634 is a wasteful number, since it uses less digits than its factorization.

231660634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115830319.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 231660634 is about 15220.4019000814. The cubic root of 231660634 is about 614.1636097719.

The spelling of 231660634 in words is "two hundred thirty-one million, six hundred sixty thousand, six hundred thirty-four".