51312559 has 8 divisors (see below), whose sum is σ = 54138240. Its totient is φ = 48499416.

The previous prime is 51312551. The next prime is 51312577. The reversal of 51312559 is 95521315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51312559 - 2³ = 51312551 is a prime.

It is a super-2 number, since 2×51312559² = 5265957422256962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51312559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312551) 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, 5982 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (6767280).

Almost surely, 2^51312559 is an apocalyptic number.

51312559 is a deficient number, since it is larger than the sum of its proper divisors (2825681).

51312559 is a wasteful number, since it uses less digits than its factorization.

51312559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6269.

The product of its digits is 6750, while the sum is 31.

The square root of 51312559 is about 7163.2785091744. The cubic root of 51312559 is about 371.5990182557.

The spelling of 51312559 in words is "fifty-one million, three hundred twelve thousand, five hundred fifty-nine".