51218794 has 16 divisors (see below), whose sum is σ = 88224480. Its totient is φ = 22055760.

The previous prime is 51218779. The next prime is 51218801. The reversal of 51218794 is 49781215.

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, 60849 + ... + 61684.

It is an arithmetic number, because the mean of its divisors is an integer number (5514030).

Almost surely, 2^51218794 is an apocalyptic number.

51218794 is a deficient number, since it is larger than the sum of its proper divisors (37005686).

51218794 is a wasteful number, since it uses less digits than its factorization.

51218794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122565.

The product of its digits is 20160, while the sum is 37.

The square root of 51218794 is about 7156.7306781798. The cubic root of 51218794 is about 371.3725355166.

It can be divided in two parts, 512 and 18794, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 51218794 in words is "fifty-one million, two hundred eighteen thousand, seven hundred ninety-four".