31509858253 has 2 divisors, whose sum is σ = 31509858254. Its totient is φ = 31509858252.

The previous prime is 31509858227. The next prime is 31509858269. The reversal of 31509858253 is 35285890513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29612558889 + 1897299364 = 172083^2 + 43558^2 .

It is a cyclic number.

It is not a de Polignac number, because 31509858253 - 2¹⁷ = 31509727181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31509858197 and 31509858206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31509858353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15754929126 + 15754929127.

It is an arithmetic number, because the mean of its divisors is an integer number (15754929127).

Almost surely, 2^31509858253 is an apocalyptic number.

It is an amenable number.

31509858253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31509858253 is an equidigital number, since it uses as much as digits as its factorization.

31509858253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 31509858253 in words is "thirty-one billion, five hundred nine million, eight hundred fifty-eight thousand, two hundred fifty-three".