51636460231 has 4 divisors (see below), whose sum is σ = 51646819432. Its totient is φ = 51626101032.

The previous prime is 51636460147. The next prime is 51636460307. The reversal of 51636460231 is 13206463615.

51636460231 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, and also an emirpimes, since its reverse is a distinct semiprime: 13206463615 = 5 ⋅2641292723.

It is a cyclic number.

It is not a de Polignac number, because 51636460231 - 2⁷ = 51636460103 is a prime.

It is a super-2 number, since 2×51636460231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51636460831) 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, 5172120 + ... + 5182093.

It is an arithmetic number, because the mean of its divisors is an integer number (12911704858).

Almost surely, 2^51636460231 is an apocalyptic number.

51636460231 is a deficient number, since it is larger than the sum of its proper divisors (10359201).

51636460231 is a wasteful number, since it uses less digits than its factorization.

51636460231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359200.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 51636460231 in words is "fifty-one billion, six hundred thirty-six million, four hundred sixty thousand, two hundred thirty-one".