51516211567 has 8 divisors (see below), whose sum is σ = 51566061456. Its totient is φ = 51466387392.

The previous prime is 51516211561. The next prime is 51516211589. The reversal of 51516211567 is 76511261515.

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 51516211567 - 2³ = 51516211559 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 (51516211561) 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, 9103803 + ... + 9109459.

It is an arithmetic number, because the mean of its divisors is an integer number (6445757682).

Almost surely, 2^51516211567 is an apocalyptic number.

51516211567 is a deficient number, since it is larger than the sum of its proper divisors (49849889).

51516211567 is a wasteful number, since it uses less digits than its factorization.

51516211567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857.

The product of its digits is 63000, while the sum is 40.

The spelling of 51516211567 in words is "fifty-one billion, five hundred sixteen million, two hundred eleven thousand, five hundred sixty-seven".