51824040431 has 4 divisors (see below), whose sum is σ = 51897969864. Its totient is φ = 51750111000.

The previous prime is 51824040419. The next prime is 51824040461. The reversal of 51824040431 is 13404042815.

51824040431 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: 13404042815 = 5 ⋅2680808563.

It is a cyclic number.

It is not a de Polignac number, because 51824040431 - 2¹⁸ = 51823778287 is a prime.

It is a super-2 number, since 2×51824040431² (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 (51824040461) 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, 36963665 + ... + 36965066.

It is an arithmetic number, because the mean of its divisors is an integer number (12974492466).

Almost surely, 2^51824040431 is an apocalyptic number.

51824040431 is a deficient number, since it is larger than the sum of its proper divisors (73929433).

51824040431 is an equidigital number, since it uses as much as digits as its factorization.

51824040431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73929432.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 51824040431 in words is "fifty-one billion, eight hundred twenty-four million, forty thousand, four hundred thirty-one".