31225352122553 has 4 divisors (see below), whose sum is σ = 31226142257268. Its totient is φ = 31224561987840.

The previous prime is 31225352122519. The next prime is 31225352122571. The reversal of 31225352122553 is 35522125352213.

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 2706462587689 + 28518889534864 = 1645133^2 + 5340308^2 .

It is a cyclic number.

It is not a de Polignac number, because 31225352122553 - 2²⁰ = 31225351073977 is a prime.

It is a super-4 number, since 4×31225352122553⁴ (a number of 55 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31225352122553.

It is not an unprimeable number, because it can be changed into a prime (31225352122253) 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, 395008076 + ... + 395087117.

It is an arithmetic number, because the mean of its divisors is an integer number (7806535564317).

Almost surely, 2^{31225352122553} is an apocalyptic number.

It is an amenable number.

31225352122553 is a deficient number, since it is larger than the sum of its proper divisors (790134715).

31225352122553 is an equidigital number, since it uses as much as digits as its factorization.

31225352122553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790134714.

The product of its digits is 540000, while the sum is 41.

Adding to 31225352122553 its reverse (35522125352213), we get a palindrome (66747477474766).

The spelling of 31225352122553 in words is "thirty-one trillion, two hundred twenty-five billion, three hundred fifty-two million, one hundred twenty-two thousand, five hundred fifty-three".