51337864 has 8 divisors (see below), whose sum is σ = 96258510. Its totient is φ = 25668928.

The previous prime is 51337861. The next prime is 51337877. The reversal of 51337864 is 46873315.

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 2924100 = 6958^2 + 1710^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51337861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208609 + ... + 3208624.

Almost surely, 2^51337864 is an apocalyptic number.

It is an amenable number.

51337864 is a deficient number, since it is larger than the sum of its proper divisors (44920646).

51337864 is a wasteful number, since it uses less digits than its factorization.

51337864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6417239 (or 6417235 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 51337864 is about 7165.0445916268. The cubic root of 51337864 is about 371.6600934129.

The spelling of 51337864 in words is "fifty-one million, three hundred thirty-seven thousand, eight hundred sixty-four".