531166464 has 72 divisors (see below), whose sum is σ = 1570773120. Its totient is φ = 177053184.

The previous prime is 531166463. The next prime is 531166481. The reversal of 531166464 is 464661135.

It is a happy number.

531166464 is a `hidden beast` number, since 5 + 3 + 1 + 1 + 6 + 646 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531166463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31512 + ... + 45335.

Almost surely, 2^531166464 is an apocalyptic number.

531166464 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

531166464 is an abundant number, since it is smaller than the sum of its proper divisors (1039606656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531166464 is an equidigital number, since it uses as much as digits as its factorization.

531166464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76872 (or 76852 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 531166464 is about 23047.0489217166. The cubic root of 531166464 is about 809.8604972374.

The spelling of 531166464 in words is "five hundred thirty-one million, one hundred sixty-six thousand, four hundred sixty-four".