51013864 has 32 divisors (see below), whose sum is σ = 104768640. Its totient is φ = 23094400.

The previous prime is 51013843. The next prime is 51013877. The reversal of 51013864 is 46831015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23697 + ... + 25759.

It is an arithmetic number, because the mean of its divisors is an integer number (3274020).

Almost surely, 2^51013864 is an apocalyptic number.

It is an amenable number.

51013864 is an abundant number, since it is smaller than the sum of its proper divisors (53754776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51013864 is a wasteful number, since it uses less digits than its factorization.

51013864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51013864 is about 7142.3990367383. The cubic root of 51013864 is about 370.8765775882.

Adding to 51013864 its reverse (46831015), we get a palindrome (97844879).

The spelling of 51013864 in words is "fifty-one million, thirteen thousand, eight hundred sixty-four".