64311257 has 4 divisors (see below), whose sum is σ = 67696080. Its totient is φ = 60926436.

The previous prime is 64311253. The next prime is 64311259. The reversal of 64311257 is 75211346.

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 a cyclic number.

It is not a de Polignac number, because 64311257 - 2² = 64311253 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (64311253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692383 + ... + 1692420.

It is an arithmetic number, because the mean of its divisors is an integer number (16924020).

Almost surely, 2^64311257 is an apocalyptic number.

It is an amenable number.

64311257 is a deficient number, since it is larger than the sum of its proper divisors (3384823).

64311257 is a wasteful number, since it uses less digits than its factorization.

64311257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384822.

The product of its digits is 5040, while the sum is 29.

The square root of 64311257 is about 8019.4299672732. The cubic root of 64311257 is about 400.6474036892.

The spelling of 64311257 in words is "sixty-four million, three hundred eleven thousand, two hundred fifty-seven".