51031516 has 12 divisors (see below), whose sum is σ = 89769232. Its totient is φ = 25383168.

The previous prime is 51031499. The next prime is 51031523. The reversal of 51031516 is 61513015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32280 + ... + 33823.

Almost surely, 2^51031516 is an apocalyptic number.

It is an amenable number.

51031516 is a deficient number, since it is larger than the sum of its proper divisors (38737716).

51031516 is a wasteful number, since it uses less digits than its factorization.

51031516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66300 (or 66298 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51031516 is about 7143.6346491125. The cubic root of 51031516 is about 370.9193500025.

The spelling of 51031516 in words is "fifty-one million, thirty-one thousand, five hundred sixteen".