64385131 has 2 divisors, whose sum is σ = 64385132. Its totient is φ = 64385130.

The previous prime is 64385117. The next prime is 64385149. The reversal of 64385131 is 13158346.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64385131 is a prime.

It is a super-2 number, since 2×64385131² = 8290890187774322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64385093 and 64385102.

It is not a weakly prime, because it can be changed into another prime (64385161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32192565 + 32192566.

It is an arithmetic number, because the mean of its divisors is an integer number (32192566).

Almost surely, 2^64385131 is an apocalyptic number.

64385131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64385131 is an equidigital number, since it uses as much as digits as its factorization.

64385131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 64385131 is about 8024.0345836742. The cubic root of 64385131 is about 400.8007521702.

It can be divided in two parts, 64385 and 131, that added together give a square (64516 = 254²).

The spelling of 64385131 in words is "sixty-four million, three hundred eighty-five thousand, one hundred thirty-one".