51318468 has 96 divisors (see below), whose sum is σ = 142128000. Its totient is φ = 15966720.

The previous prime is 51318439. The next prime is 51318503. The reversal of 51318468 is 86481315.

51318468 is a `hidden beast` number, since 513 + 1 + 84 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182488 + ... + 182768.

It is an arithmetic number, because the mean of its divisors is an integer number (1480500).

Almost surely, 2^51318468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51318468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71064000).

51318468 is an abundant number, since it is smaller than the sum of its proper divisors (90809532).

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

51318468 is a wasteful number, since it uses less digits than its factorization.

51318468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 394 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 51318468 is about 7163.6909481077. The cubic root of 51318468 is about 371.6132817834.

It can be divided in two parts, 513 and 18468, that multiplied together give a square (9474084 = 3078²).

The spelling of 51318468 in words is "fifty-one million, three hundred eighteen thousand, four hundred sixty-eight".