31130522231 has 2 divisors, whose sum is σ = 31130522232. Its totient is φ = 31130522230.

The previous prime is 31130522221. The next prime is 31130522251. The reversal of 31130522231 is 13222503113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31130522231 - 2⁶ = 31130522167 is a prime.

It is a super-2 number, since 2×31130522231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31130522197 and 31130522206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130522221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565261115 + 15565261116.

It is an arithmetic number, because the mean of its divisors is an integer number (15565261116).

Almost surely, 2^31130522231 is an apocalyptic number.

31130522231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130522231 is an equidigital number, since it uses as much as digits as its factorization.

31130522231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The spelling of 31130522231 in words is "thirty-one billion, one hundred thirty million, five hundred twenty-two thousand, two hundred thirty-one".