231505132 has 6 divisors (see below), whose sum is σ = 405133988. Its totient is φ = 115752564.

The previous prime is 231505123. The next prime is 231505159.

231505132 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×231505132² = 107189252284674848, which contains 22 as substring.

It is an unprimeable number.

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, 28938138 + ... + 28938145.

Almost surely, 2^231505132 is an apocalyptic number.

It is an amenable number.

231505132 is a deficient number, since it is larger than the sum of its proper divisors (173628856).

231505132 is a wasteful number, since it uses less digits than its factorization.

231505132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57876287 (or 57876285 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 231505132 is about 15215.2927017524. The cubic root of 231505132 is about 614.0261600825.

It can be divided in two parts, 23150 and 5132, that added together give a palindrome (28282).

The spelling of 231505132 in words is "two hundred thirty-one million, five hundred five thousand, one hundred thirty-two".