51312751 has 6 divisors (see below), whose sum is σ = 59690400. Its totient is φ = 43982316.

The previous prime is 51312739. The next prime is 51312757. The reversal of 51312751 is 15721315.

It is not a de Polignac number, because 51312751 - 2¹¹ = 51310703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 523551 + ... + 523648.

It is an arithmetic number, because the mean of its divisors is an integer number (9948400).

Almost surely, 2^51312751 is an apocalyptic number.

51312751 is a deficient number, since it is larger than the sum of its proper divisors (8377649).

51312751 is a wasteful number, since it uses less digits than its factorization.

51312751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047213 (or 1047206 counting only the distinct ones).

The product of its digits is 1050, while the sum is 25.

The square root of 51312751 is about 7163.2919108466. The cubic root of 51312751 is about 371.5994817350.

The spelling of 51312751 in words is "fifty-one million, three hundred twelve thousand, seven hundred fifty-one".