51995722 has 4 divisors (see below), whose sum is σ = 77993586. Its totient is φ = 25997860.

The previous prime is 51995719. The next prime is 51995737. The reversal of 51995722 is 22759915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22759915 = 5 ⋅4551983.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 2588881 = 7029^2 + 1609^2 .

It is a super-3 number, since 3×51995722³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12998929 + ... + 12998932.

Almost surely, 2^51995722 is an apocalyptic number.

51995722 is a deficient number, since it is larger than the sum of its proper divisors (25997864).

51995722 is a wasteful number, since it uses less digits than its factorization.

51995722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25997863.

The product of its digits is 56700, while the sum is 40.

The square root of 51995722 is about 7210.8059188970. The cubic root of 51995722 is about 373.2408797070.

The spelling of 51995722 in words is "fifty-one million, nine hundred ninety-five thousand, seven hundred twenty-two".