51377864 has 16 divisors (see below), whose sum is σ = 96440220. Its totient is φ = 25660480.

The previous prime is 51377863. The next prime is 51377873. The reversal of 51377864 is 46877315.

It can be written as a sum of positive squares in 2 ways, for example, as 49815364 + 1562500 = 7058^2 + 1250^2 .

It is not an unprimeable number, because it can be changed into a prime (51377863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5462 + ... + 11514.

Almost surely, 2^51377864 is an apocalyptic number.

It is an amenable number.

51377864 is a deficient number, since it is larger than the sum of its proper divisors (45062356).

51377864 is a wasteful number, since it uses less digits than its factorization.

51377864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7120 (or 7116 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 51377864 is about 7167.8353775739. The cubic root of 51377864 is about 371.7565949239.

The spelling of 51377864 in words is "fifty-one million, three hundred seventy-seven thousand, eight hundred sixty-four".