521890202231 has 2 divisors, whose sum is σ = 521890202232. Its totient is φ = 521890202230.

The previous prime is 521890202227. The next prime is 521890202261. The reversal of 521890202231 is 132202098125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521890202231 - 2² = 521890202227 is a prime.

It is a super-2 number, since 2×521890202231² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 521890202191 and 521890202200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521890202261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260945101115 + 260945101116.

It is an arithmetic number, because the mean of its divisors is an integer number (260945101116).

Almost surely, 2^521890202231 is an apocalyptic number.

521890202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

521890202231 is an equidigital number, since it uses as much as digits as its factorization.

521890202231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 521890202231 in words is "five hundred twenty-one billion, eight hundred ninety million, two hundred two thousand, two hundred thirty-one".