51715222 has 16 divisors (see below), whose sum is σ = 83713392. Its totient is φ = 23819040.

The previous prime is 51715199. The next prime is 51715231. The reversal of 51715222 is 22251715.

It is a congruent number.

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, 12697 + ... + 16267.

It is an arithmetic number, because the mean of its divisors is an integer number (5232087).

Almost surely, 2^51715222 is an apocalyptic number.

51715222 is a deficient number, since it is larger than the sum of its proper divisors (31998170).

51715222 is a wasteful number, since it uses less digits than its factorization.

51715222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143.

The product of its digits is 1400, while the sum is 25.

The square root of 51715222 is about 7191.3296406158. The cubic root of 51715222 is about 372.5684981310.

Adding to 51715222 its reverse (22251715), we get a palindrome (73966937).

The spelling of 51715222 in words is "fifty-one million, seven hundred fifteen thousand, two hundred twenty-two".