51313251617 has 8 divisors (see below), whose sum is σ = 52449831552. Its totient is φ = 50178538800.

The previous prime is 51313251589. The next prime is 51313251623. The reversal of 51313251617 is 71615231315.

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 51313251617 - 2⁶ = 51313251553 is a prime.

It is a super-2 number, since 2×51313251617² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51313211617) 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, 411134 + ... + 521207.

It is an arithmetic number, because the mean of its divisors is an integer number (6556228944).

Almost surely, 2^51313251617 is an apocalyptic number.

It is an amenable number.

51313251617 is a deficient number, since it is larger than the sum of its proper divisors (1136579935).

51313251617 is a wasteful number, since it uses less digits than its factorization.

51313251617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933559.

The product of its digits is 18900, while the sum is 35.

The spelling of 51313251617 in words is "fifty-one billion, three hundred thirteen million, two hundred fifty-one thousand, six hundred seventeen".