51360018 has 16 divisors (see below), whose sum is σ = 102914400. Its totient is φ = 17087616.

The previous prime is 51360013. The next prime is 51360019. The reversal of 51360018 is 81006315.

It is a self number, because there is not a number n which added to its sum of digits gives 51360018.

It is not an unprimeable number, because it can be changed into a prime (51360011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4543 + ... + 11106.

It is an arithmetic number, because the mean of its divisors is an integer number (6432150).

Almost surely, 2^51360018 is an apocalyptic number.

51360018 is an abundant number, since it is smaller than the sum of its proper divisors (51554382).

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

51360018 is a wasteful number, since it uses less digits than its factorization.

51360018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16201.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 51360018 is about 7166.5904026950. The cubic root of 51360018 is about 371.7135469653.

The spelling of 51360018 in words is "fifty-one million, three hundred sixty thousand, eighteen".