501809713231 has 2 divisors, whose sum is σ = 501809713232. Its totient is φ = 501809713230.

The previous prime is 501809713219. The next prime is 501809713247. The reversal of 501809713231 is 132317908105.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501809713231 - 2⁵ = 501809713199 is a prime.

It is a super-2 number, since 2×501809713231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501809713211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250904856615 + 250904856616.

It is an arithmetic number, because the mean of its divisors is an integer number (250904856616).

Almost surely, 2^501809713231 is an apocalyptic number.

501809713231 is a deficient number, since it is larger than the sum of its proper divisors (1).

501809713231 is an equidigital number, since it uses as much as digits as its factorization.

501809713231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 501809713231 in words is "five hundred one billion, eight hundred nine million, seven hundred thirteen thousand, two hundred thirty-one".