51215428879 has 8 divisors (see below), whose sum is σ = 55977395328. Its totient is φ = 46647828480.

The previous prime is 51215428843. The next prime is 51215428883. The reversal of 51215428879 is 97882451215.

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 51215428879 - 2¹¹ = 51215426831 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 (51215428889) 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, 48590962 + ... + 48592015.

It is an arithmetic number, because the mean of its divisors is an integer number (6997174416).

Almost surely, 2^51215428879 is an apocalyptic number.

51215428879 is a deficient number, since it is larger than the sum of its proper divisors (4761966449).

51215428879 is a wasteful number, since it uses less digits than its factorization.

51215428879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97183025.

The product of its digits is 1612800, while the sum is 52.

The spelling of 51215428879 in words is "fifty-one billion, two hundred fifteen million, four hundred twenty-eight thousand, eight hundred seventy-nine".