31105323253 has 2 divisors, whose sum is σ = 31105323254. Its totient is φ = 31105323252.

The previous prime is 31105323209. The next prime is 31105323259. The reversal of 31105323253 is 35232350113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31102144164 + 3179089 = 176358^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 31105323253 - 2⁹ = 31105322741 is a prime.

It is a super-2 number, since 2×31105323253² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31105323259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15552661626 + 15552661627.

It is an arithmetic number, because the mean of its divisors is an integer number (15552661627).

Almost surely, 2^31105323253 is an apocalyptic number.

It is an amenable number.

31105323253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31105323253 is an equidigital number, since it uses as much as digits as its factorization.

31105323253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 31105323253 its reverse (35232350113), we get a palindrome (66337673366).

The spelling of 31105323253 in words is "thirty-one billion, one hundred five million, three hundred twenty-three thousand, two hundred fifty-three".