51837994 has 16 divisors (see below), whose sum is σ = 84306600. Its totient is φ = 23762880.

The previous prime is 51837979. The next prime is 51837997. The reversal of 51837994 is 49973815.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14175225 + 37662769 = 3765^2 + 6137^2 .

It is not an unprimeable number, because it can be changed into a prime (51837997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2817 + ... + 10564.

Almost surely, 2^51837994 is an apocalyptic number.

51837994 is a deficient number, since it is larger than the sum of its proper divisors (32468606).

51837994 is a wasteful number, since it uses less digits than its factorization.

51837994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13545.

The product of its digits is 272160, while the sum is 46.

The square root of 51837994 is about 7199.8606930968. The cubic root of 51837994 is about 372.8630911552.

The spelling of 51837994 in words is "fifty-one million, eight hundred thirty-seven thousand, nine hundred ninety-four".