51312975 has 48 divisors (see below), whose sum is σ = 99255552. Its totient is φ = 22901760.

The previous prime is 51312959. The next prime is 51312979. The reversal of 51312975 is 57921315.

It is not a de Polignac number, because 51312975 - 2⁴ = 51312959 is a prime.

It is a super-3 number, since 3×51312975³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21439 + ... + 23711.

It is an arithmetic number, because the mean of its divisors is an integer number (2067824).

Almost surely, 2^51312975 is an apocalyptic number.

51312975 is a deficient number, since it is larger than the sum of its proper divisors (47942577).

51312975 is a wasteful number, since it uses less digits than its factorization.

51312975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336 (or 2331 counting only the distinct ones).

The product of its digits is 9450, while the sum is 33.

The square root of 51312975 is about 7163.3075460991. The cubic root of 51312975 is about 371.6000224593.

The spelling of 51312975 in words is "fifty-one million, three hundred twelve thousand, nine hundred seventy-five".