531231304 has 8 divisors (see below), whose sum is σ = 996058710. Its totient is φ = 265615648.

The previous prime is 531231289. The next prime is 531231307. The reversal of 531231304 is 403132135.

It can be written as a sum of positive squares in only one way, i.e., 523952100 + 7279204 = 22890^2 + 2698^2 .

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

It is not an unprimeable number, because it can be changed into a prime (531231307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33201949 + ... + 33201964.

Almost surely, 2^531231304 is an apocalyptic number.

It is an amenable number.

531231304 is a deficient number, since it is larger than the sum of its proper divisors (464827406).

531231304 is a wasteful number, since it uses less digits than its factorization.

531231304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66403919 (or 66403915 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 531231304 is about 23048.4555664799. The cubic root of 531231304 is about 809.8934493793.

Adding to 531231304 its reverse (403132135), we get a palindrome (934363439).

The spelling of 531231304 in words is "five hundred thirty-one million, two hundred thirty-one thousand, three hundred four".