51312567 has 8 divisors (see below), whose sum is σ = 68661360. Its totient is φ = 34086080.

The previous prime is 51312551. The next prime is 51312577. The reversal of 51312567 is 76521315.

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 51312567 - 2⁴ = 51312551 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51312577) 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, 29592 + ... + 31277.

It is an arithmetic number, because the mean of its divisors is an integer number (8582670).

Almost surely, 2^51312567 is an apocalyptic number.

51312567 is a deficient number, since it is larger than the sum of its proper divisors (17348793).

51312567 is a wasteful number, since it uses less digits than its factorization.

51312567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61153.

The product of its digits is 6300, while the sum is 30.

The square root of 51312567 is about 7163.2790675779. The cubic root of 51312567 is about 371.5990375674.

The spelling of 51312567 in words is "fifty-one million, three hundred twelve thousand, five hundred sixty-seven".