51937972 has 6 divisors (see below), whose sum is σ = 90891458. Its totient is φ = 25968984.

The previous prime is 51937943. The next prime is 51937981. The reversal of 51937972 is 27973915.

It can be written as a sum of positive squares in only one way, i.e., 33223696 + 18714276 = 5764^2 + 4326^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492243 + ... + 6492250.

Almost surely, 2^51937972 is an apocalyptic number.

It is an amenable number.

51937972 is a deficient number, since it is larger than the sum of its proper divisors (38953486).

51937972 is a wasteful number, since it uses less digits than its factorization.

51937972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12984497 (or 12984495 counting only the distinct ones).

The product of its digits is 119070, while the sum is 43.

The square root of 51937972 is about 7206.8003996226. The cubic root of 51937972 is about 373.1026462464.

The spelling of 51937972 in words is "fifty-one million, nine hundred thirty-seven thousand, nine hundred seventy-two".