51363018 has 64 divisors (see below), whose sum is σ = 138136320. Its totient is φ = 13810176.

The previous prime is 51363017. The next prime is 51363029. The reversal of 51363018 is 81036315.

51363018 is a `hidden beast` number, since 5 + 13 + 630 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51362982 and 51363000.

It is not an unprimeable number, because it can be changed into a prime (51363017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2430 + ... + 10422.

It is an arithmetic number, because the mean of its divisors is an integer number (2158380).

Almost surely, 2^51363018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51363018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69068160).

51363018 is an abundant number, since it is smaller than the sum of its proper divisors (86773302).

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

51363018 is a wasteful number, since it uses less digits than its factorization.

51363018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028 (or 8022 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 51363018 is about 7166.7997041915. The cubic root of 51363018 is about 371.7207842352.

The spelling of 51363018 in words is "fifty-one million, three hundred sixty-three thousand, eighteen".