64560531 has 16 divisors (see below), whose sum is σ = 98547968. Its totient is φ = 36828000.

The previous prime is 64560521. The next prime is 64560533. The reversal of 64560531 is 13506546.

It is not a de Polignac number, because 64560531 - 2¹⁰ = 64559507 is a prime.

It is a super-2 number, since 2×64560531² = 8336124326003922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64560533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11556 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (6159248).

Almost surely, 2^64560531 is an apocalyptic number.

64560531 is a deficient number, since it is larger than the sum of its proper divisors (33987437).

64560531 is a wasteful number, since it uses less digits than its factorization.

64560531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 64560531 is about 8034.9568138230. The cubic root of 64560531 is about 401.1643801748.

The spelling of 64560531 in words is "sixty-four million, five hundred sixty thousand, five hundred thirty-one".