51318624 has 48 divisors (see below), whose sum is σ = 153957888. Its totient is φ = 14662272.

The previous prime is 51318607. The next prime is 51318643. The reversal of 51318624 is 42681315.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 51318591 and 51318600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37512 + ... + 38855.

It is an arithmetic number, because the mean of its divisors is an integer number (3207456).

Almost surely, 2^51318624 is an apocalyptic number.

It is an amenable number.

51318624 is an abundant number, since it is smaller than the sum of its proper divisors (102639264).

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

51318624 is a wasteful number, since it uses less digits than its factorization.

51318624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76387 (or 76379 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 51318624 is about 7163.7018363413. The cubic root of 51318624 is about 371.6136583315.

Adding to 51318624 its reverse (42681315), we get a palindrome (93999939).

The spelling of 51318624 in words is "fifty-one million, three hundred eighteen thousand, six hundred twenty-four".