31401235253 has 2 divisors, whose sum is σ = 31401235254. Its totient is φ = 31401235252.

The previous prime is 31401235241. The next prime is 31401235301. The reversal of 31401235253 is 35253210413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31095090244 + 306145009 = 176338^2 + 17497^2 .

It is a cyclic number.

It is not a de Polignac number, because 31401235253 - 2³² = 27106267957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31401265253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700617626 + 15700617627.

It is an arithmetic number, because the mean of its divisors is an integer number (15700617627).

Almost surely, 2^31401235253 is an apocalyptic number.

It is an amenable number.

31401235253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401235253 is an equidigital number, since it uses as much as digits as its factorization.

31401235253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 31401235253 its reverse (35253210413), we get a palindrome (66654445666).

The spelling of 31401235253 in words is "thirty-one billion, four hundred one million, two hundred thirty-five thousand, two hundred fifty-three".