51217794 has 12 divisors (see below), whose sum is σ = 110971926. Its totient is φ = 17072592.

The previous prime is 51217781. The next prime is 51217811. The reversal of 51217794 is 49771215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46744569 + 4473225 = 6837^2 + 2115^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1422699 + ... + 1422734.

Almost surely, 2^51217794 is an apocalyptic number.

51217794 is an abundant number, since it is smaller than the sum of its proper divisors (59754132).

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

51217794 is a wasteful number, since it uses less digits than its factorization.

51217794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845441 (or 2845438 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 51217794 is about 7156.6608135359. The cubic root of 51217794 is about 371.3701185981.

The spelling of 51217794 in words is "fifty-one million, two hundred seventeen thousand, seven hundred ninety-four".