51915318 has 32 divisors (see below), whose sum is σ = 127792896. Its totient is φ = 13691808.

The previous prime is 51915299. The next prime is 51915343. The reversal of 51915318 is 81351915.

It is a super-2 number, since 2×51915318² = 5390400486082248, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 46996 + ... + 48087.

It is an arithmetic number, because the mean of its divisors is an integer number (3993528).

Almost surely, 2^51915318 is an apocalyptic number.

51915318 is an abundant number, since it is smaller than the sum of its proper divisors (75877578).

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

51915318 is a wasteful number, since it uses less digits than its factorization.

51915318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95108.

The product of its digits is 5400, while the sum is 33.

The square root of 51915318 is about 7205.2285182359. The cubic root of 51915318 is about 373.0483924496.

The spelling of 51915318 in words is "fifty-one million, nine hundred fifteen thousand, three hundred eighteen".