31322221253 has 2 divisors, whose sum is σ = 31322221254. Its totient is φ = 31322221252.

The previous prime is 31322221211. The next prime is 31322221267. The reversal of 31322221253 is 35212222313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27757892449 + 3564328804 = 166607^2 + 59702^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322221253 - 2¹⁰ = 31322220229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31322224253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661110626 + 15661110627.

It is an arithmetic number, because the mean of its divisors is an integer number (15661110627).

Almost surely, 2^31322221253 is an apocalyptic number.

It is an amenable number.

31322221253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31322221253 is an equidigital number, since it uses as much as digits as its factorization.

31322221253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

Adding to 31322221253 its reverse (35212222313), we get a palindrome (66534443566).

The spelling of 31322221253 in words is "thirty-one billion, three hundred twenty-two million, two hundred twenty-one thousand, two hundred fifty-three".