51312711 has 16 divisors (see below), whose sum is σ = 72295040. Its totient is φ = 32283360.

The previous prime is 51312707. The next prime is 51312721. The reversal of 51312711 is 11721315.

It is a happy number.

It is not a de Polignac number, because 51312711 - 2² = 51312707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14541 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (4518440).

Almost surely, 2^51312711 is an apocalyptic number.

51312711 is a deficient number, since it is larger than the sum of its proper divisors (20982329).

51312711 is a wasteful number, since it uses less digits than its factorization.

51312711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486.

The product of its digits is 210, while the sum is 21.

The square root of 51312711 is about 7163.2891188336. The cubic root of 51312711 is about 371.5993851769.

The spelling of 51312711 in words is "fifty-one million, three hundred twelve thousand, seven hundred eleven".