51274398971 has 4 divisors (see below), whose sum is σ = 51976788072. Its totient is φ = 50572009872.

The previous prime is 51274398953. The next prime is 51274398983. The reversal of 51274398971 is 17989347215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51274398971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51274398911) 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, 351194441 + ... + 351194586.

It is an arithmetic number, because the mean of its divisors is an integer number (12994197018).

Almost surely, 2^51274398971 is an apocalyptic number.

51274398971 is a deficient number, since it is larger than the sum of its proper divisors (702389101).

51274398971 is an equidigital number, since it uses as much as digits as its factorization.

51274398971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702389100.

The product of its digits is 3810240, while the sum is 56.

The spelling of 51274398971 in words is "fifty-one billion, two hundred seventy-four million, three hundred ninety-eight thousand, nine hundred seventy-one".