31231320210253 has 2 divisors, whose sum is σ = 31231320210254. Its totient is φ = 31231320210252.

The previous prime is 31231320210241. The next prime is 31231320210271. The reversal of 31231320210253 is 35201202313213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20464377395049 + 10766942815204 = 4523757^2 + 3281302^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231320210253 - 2¹⁷ = 31231320079181 is a prime.

It is a super-4 number, since 4×31231320210253⁴ (a number of 55 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31231320210053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615660105126 + 15615660105127.

It is an arithmetic number, because the mean of its divisors is an integer number (15615660105127).

Almost surely, 2^{31231320210253} is an apocalyptic number.

It is an amenable number.

31231320210253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231320210253 is an equidigital number, since it uses as much as digits as its factorization.

31231320210253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 31231320210253 its reverse (35201202313213), we get a palindrome (66432522523466).

The spelling of 31231320210253 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, two hundred ten thousand, two hundred fifty-three".