64131357 has 4 divisors (see below), whose sum is σ = 85508480. Its totient is φ = 42754236.

The previous prime is 64131341. The next prime is 64131367. The reversal of 64131357 is 75313146.

64131357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64131357 - 2⁴ = 64131341 is a prime.

It is a super-2 number, since 2×64131357² = 8225661901322898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64131307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10688557 + ... + 10688562.

It is an arithmetic number, because the mean of its divisors is an integer number (21377120).

Almost surely, 2^64131357 is an apocalyptic number.

It is an amenable number.

64131357 is a deficient number, since it is larger than the sum of its proper divisors (21377123).

64131357 is a wasteful number, since it uses less digits than its factorization.

64131357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21377122.

The product of its digits is 7560, while the sum is 30.

The square root of 64131357 is about 8008.2056042537. The cubic root of 64131357 is about 400.2734734048.

The spelling of 64131357 in words is "sixty-four million, one hundred thirty-one thousand, three hundred fifty-seven".