51890312 has 16 divisors (see below), whose sum is σ = 97859340. Its totient is φ = 25794496.

The previous prime is 51890299. The next prime is 51890351. The reversal of 51890312 is 21309815.

It can be written as a sum of positive squares in 2 ways, for example, as 51351556 + 538756 = 7166^2 + 734^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 17363 + ... + 20130.

Almost surely, 2^51890312 is an apocalyptic number.

It is an amenable number.

51890312 is a deficient number, since it is larger than the sum of its proper divisors (45969028).

51890312 is a wasteful number, since it uses less digits than its factorization.

51890312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37672 (or 37668 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 51890312 is about 7203.4930415737. The cubic root of 51890312 is about 372.9884875468.

The spelling of 51890312 in words is "fifty-one million, eight hundred ninety thousand, three hundred twelve".