51294790219 has 4 divisors (see below), whose sum is σ = 53994516040. Its totient is φ = 48595064400.

The previous prime is 51294790177. The next prime is 51294790223. The reversal of 51294790219 is 91209749215.

51294790219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51294790219 - 2³⁵ = 16935051851 is a prime.

It is a super-2 number, since 2×51294790219² (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 (51294790229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349862882 + ... + 1349862919.

It is an arithmetic number, because the mean of its divisors is an integer number (13498629010).

Almost surely, 2^51294790219 is an apocalyptic number.

51294790219 is a deficient number, since it is larger than the sum of its proper divisors (2699725821).

51294790219 is a wasteful number, since it uses less digits than its factorization.

51294790219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699725820.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 51294790219 in words is "fifty-one billion, two hundred ninety-four million, seven hundred ninety thousand, two hundred nineteen".