51046532731 has 4 divisors (see below), whose sum is σ = 52009674912. Its totient is φ = 50083390552.

The previous prime is 51046532729. The next prime is 51046532753. The reversal of 51046532731 is 13723564015.

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 51046532731 - 2¹ = 51046532729 is a prime.

It is a super-2 number, since 2×51046532731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51046532701) 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, 481571011 + ... + 481571116.

It is an arithmetic number, because the mean of its divisors is an integer number (13002418728).

Almost surely, 2^51046532731 is an apocalyptic number.

51046532731 is a deficient number, since it is larger than the sum of its proper divisors (963142181).

51046532731 is an equidigital number, since it uses as much as digits as its factorization.

51046532731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963142180.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 51046532731 in words is "fifty-one billion, forty-six million, five hundred thirty-two thousand, seven hundred thirty-one".