231131464 has 8 divisors (see below), whose sum is σ = 433371510. Its totient is φ = 115565728.

The previous prime is 231131429. The next prime is 231131471. The reversal of 231131464 is 464131132.

It can be written as a sum of positive squares in only one way, i.e., 149084100 + 82047364 = 12210^2 + 9058^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445709 + ... + 14445724.

Almost surely, 2^231131464 is an apocalyptic number.

It is an amenable number.

231131464 is a deficient number, since it is larger than the sum of its proper divisors (202240046).

231131464 is a wasteful number, since it uses less digits than its factorization.

231131464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28891439 (or 28891435 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 231131464 is about 15203.0083865004. The cubic root of 231131464 is about 613.6956195571.

Adding to 231131464 its reverse (464131132), we get a palindrome (695262596).

The spelling of 231131464 in words is "two hundred thirty-one million, one hundred thirty-one thousand, four hundred sixty-four".