521223335131 has 2 divisors, whose sum is σ = 521223335132. Its totient is φ = 521223335130.

The previous prime is 521223335107. The next prime is 521223335141. The reversal of 521223335131 is 131533322125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521223335131 - 2⁵ = 521223335099 is a prime.

It is a super-2 number, since 2×521223335131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521223335093 and 521223335102.

It is not a weakly prime, because it can be changed into another prime (521223335141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260611667565 + 260611667566.

It is an arithmetic number, because the mean of its divisors is an integer number (260611667566).

Almost surely, 2^521223335131 is an apocalyptic number.

521223335131 is a deficient number, since it is larger than the sum of its proper divisors (1).

521223335131 is an equidigital number, since it uses as much as digits as its factorization.

521223335131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 31.

Adding to 521223335131 its reverse (131533322125), we get a palindrome (652756657256).

The spelling of 521223335131 in words is "five hundred twenty-one billion, two hundred twenty-three million, three hundred thirty-five thousand, one hundred thirty-one".