31331225132353 has 4 divisors (see below), whose sum is σ = 31332703529668. Its totient is φ = 31329746735040.

The previous prime is 31331225132351. The next prime is 31331225132401. The reversal of 31331225132353 is 35323152213313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11861845474609 + 19469379657744 = 3444103^2 + 4412412^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331225132353 - 2¹ = 31331225132351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331225132351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739166868 + ... + 739209253.

It is an arithmetic number, because the mean of its divisors is an integer number (7833175882417).

Almost surely, 2^{31331225132353} is an apocalyptic number.

It is an amenable number.

31331225132353 is a deficient number, since it is larger than the sum of its proper divisors (1478397315).

31331225132353 is a wasteful number, since it uses less digits than its factorization.

31331225132353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478397314.

The product of its digits is 145800, while the sum is 37.

Adding to 31331225132353 its reverse (35323152213313), we get a palindrome (66654377345666).

The spelling of 31331225132353 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred twenty-five million, one hundred thirty-two thousand, three hundred fifty-three".