231808132 has 12 divisors (see below), whose sum is σ = 427015120. Its totient is φ = 109803816.

The previous prime is 231808121. The next prime is 231808133.

231808132 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×231808132² = 107470020122658848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 231808132.

It is not an unprimeable number, because it can be changed into a prime (231808133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524978 + ... + 1525129.

Almost surely, 2^231808132 is an apocalyptic number.

It is an amenable number.

231808132 is a deficient number, since it is larger than the sum of its proper divisors (195206988).

231808132 is a wasteful number, since it uses less digits than its factorization.

231808132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050130 (or 3050128 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 231808132 is about 15225.2465333078. The cubic root of 231808132 is about 614.2939278203.

The spelling of 231808132 in words is "two hundred thirty-one million, eight hundred eight thousand, one hundred thirty-two".