531564065 has 16 divisors (see below), whose sum is σ = 663427776. Its totient is φ = 408542400.

The previous prime is 531564049. The next prime is 531564079. The reversal of 531564065 is 560465135.

It is not a de Polignac number, because 531564065 - 2⁴ = 531564049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7151 + ... + 33380.

It is an arithmetic number, because the mean of its divisors is an integer number (41464236).

Almost surely, 2^531564065 is an apocalyptic number.

It is an amenable number.

531564065 is a deficient number, since it is larger than the sum of its proper divisors (131863711).

531564065 is a wasteful number, since it uses less digits than its factorization.

531564065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40640.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 531564065 is about 23055.6731630200. The cubic root of 531564065 is about 810.0625186719.

The spelling of 531564065 in words is "five hundred thirty-one million, five hundred sixty-four thousand, sixty-five".