51465317 has 4 divisors (see below), whose sum is σ = 51539436. Its totient is φ = 51391200.

The previous prime is 51465311. The next prime is 51465361. The reversal of 51465317 is 71356415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43020481 + 8444836 = 6559^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 51465317 - 2⁸ = 51465061 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 (51465311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36008 + ... + 37409.

It is an arithmetic number, because the mean of its divisors is an integer number (12884859).

Almost surely, 2^51465317 is an apocalyptic number.

It is an amenable number.

51465317 is a deficient number, since it is larger than the sum of its proper divisors (74119).

51465317 is an equidigital number, since it uses as much as digits as its factorization.

51465317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74118.

The product of its digits is 12600, while the sum is 32.

The square root of 51465317 is about 7173.9331611049. The cubic root of 51465317 is about 371.9674042623.

The spelling of 51465317 in words is "fifty-one million, four hundred sixty-five thousand, three hundred seventeen".