31555234253 has 4 divisors (see below), whose sum is σ = 32408078460. Its totient is φ = 30702390048.

The previous prime is 31555234241. The next prime is 31555234411. The reversal of 31555234253 is 35243255513.

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 17461508164 + 14093726089 = 132142^2 + 118717^2 .

It is a cyclic number.

It is not a de Polignac number, because 31555234253 - 2⁴ = 31555234237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31555234553) 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, 426422048 + ... + 426422121.

It is an arithmetic number, because the mean of its divisors is an integer number (8102019615).

Almost surely, 2^31555234253 is an apocalyptic number.

It is an amenable number.

31555234253 is a deficient number, since it is larger than the sum of its proper divisors (852844207).

31555234253 is an equidigital number, since it uses as much as digits as its factorization.

31555234253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852844206.

The product of its digits is 270000, while the sum is 38.

Adding to 31555234253 its reverse (35243255513), we get a palindrome (66798489766).

The spelling of 31555234253 in words is "thirty-one billion, five hundred fifty-five million, two hundred thirty-four thousand, two hundred fifty-three".