64475131 has 12 divisors (see below), whose sum is σ = 75513600. Its totient is φ = 54887280.

The previous prime is 64475119. The next prime is 64475153. The reversal of 64475131 is 13157446.

It is not a de Polignac number, because 64475131 - 2¹⁵ = 64442363 is a prime.

It is a super-2 number, since 2×64475131² = 8314085034934322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64475093 and 64475102.

It is not an unprimeable number, because it can be changed into a prime (64475431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2886 + ... + 11716.

It is an arithmetic number, because the mean of its divisors is an integer number (6292800).

Almost surely, 2^64475131 is an apocalyptic number.

64475131 is a deficient number, since it is larger than the sum of its proper divisors (11038469).

64475131 is a wasteful number, since it uses less digits than its factorization.

64475131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994 (or 8987 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 64475131 is about 8029.6407765229. The cubic root of 64475131 is about 400.9874167647.

The spelling of 64475131 in words is "sixty-four million, four hundred seventy-five thousand, one hundred thirty-one".