51306584240431 has 4 divisors (see below), whose sum is σ = 55253244566632. Its totient is φ = 47359923914232.

The previous prime is 51306584240333. The next prime is 51306584240491. The reversal of 51306584240431 is 13404248560315.

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

It is a cyclic number.

It is not a de Polignac number, because 51306584240431 - 2¹¹ = 51306584238383 is a prime.

It is a super-2 number, since 2×51306584240431² (a number of 28 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 (51306584240491) 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, 1973330163081 + ... + 1973330163106.

It is an arithmetic number, because the mean of its divisors is an integer number (13813311141658).

Almost surely, 2^{51306584240431} is an apocalyptic number.

51306584240431 is a deficient number, since it is larger than the sum of its proper divisors (3946660326201).

51306584240431 is a wasteful number, since it uses less digits than its factorization.

51306584240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946660326200.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 51306584240431 in words is "fifty-one trillion, three hundred six billion, five hundred eighty-four million, two hundred forty thousand, four hundred thirty-one".