51723485131 has 2 divisors, whose sum is σ = 51723485132. Its totient is φ = 51723485130.

The previous prime is 51723485123. The next prime is 51723485263. The reversal of 51723485131 is 13158432715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51723485131 - 2³ = 51723485123 is a prime.

It is a super-2 number, since 2×51723485131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51723485731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25861742565 + 25861742566.

It is an arithmetic number, because the mean of its divisors is an integer number (25861742566).

Almost surely, 2^51723485131 is an apocalyptic number.

51723485131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51723485131 is an equidigital number, since it uses as much as digits as its factorization.

51723485131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The spelling of 51723485131 in words is "fifty-one billion, seven hundred twenty-three million, four hundred eighty-five thousand, one hundred thirty-one".