225131131523 has 4 divisors (see below), whose sum is σ = 227316870768. Its totient is φ = 222945392280.

The previous prime is 225131131517. The next prime is 225131131553. The reversal of 225131131523 is 325131131522.

225131131523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 225131131523 - 2²⁴ = 225114354307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225131131553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092869468 + ... + 1092869673.

It is an arithmetic number, because the mean of its divisors is an integer number (56829217692).

Almost surely, 2^225131131523 is an apocalyptic number.

225131131523 is a deficient number, since it is larger than the sum of its proper divisors (2185739245).

225131131523 is a wasteful number, since it uses less digits than its factorization.

225131131523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185739244.

The product of its digits is 5400, while the sum is 29.

Subtracting 225131131523 from its reverse (325131131522), we obtain a palindrome (99999999999).

The spelling of 225131131523 in words is "two hundred twenty-five billion, one hundred thirty-one million, one hundred thirty-one thousand, five hundred twenty-three".