51921334969 has 24 divisors (see below), whose sum is σ = 62795304000. Its totient is φ = 42753221280.

The previous prime is 51921334961. The next prime is 51921334987. The reversal of 51921334969 is 96943312915.

It is not a de Polignac number, because 51921334969 - 2³ = 51921334961 is a prime.

It is a super-2 number, since 2×51921334969² (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 (51921334961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190974 + ... + 374584.

It is an arithmetic number, because the mean of its divisors is an integer number (2616471000).

Almost surely, 2^51921334969 is an apocalyptic number.

It is an amenable number.

51921334969 is a deficient number, since it is larger than the sum of its proper divisors (10873969031).

51921334969 is a wasteful number, since it uses less digits than its factorization.

51921334969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183853 (or 183846 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 52.

The spelling of 51921334969 in words is "fifty-one billion, nine hundred twenty-one million, three hundred thirty-four thousand, nine hundred sixty-nine".