1131031510225 has 12 divisors (see below), whose sum is σ = 1402500038940. Its totient is φ = 904811681600.

The previous prime is 1131031510177. The next prime is 1131031510249. The reversal of 1131031510225 is 5220151301311.

It can be written as a sum of positive squares in 6 ways, for example, as 30292706304 + 1100738803921 = 174048^2 + 1049161^2 .

It is not a de Polignac number, because 1131031510225 - 2³⁵ = 1096671771857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1131031510225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1581195 + ... + 2182255.

It is an arithmetic number, because the mean of its divisors is an integer number (116875003245).

Almost surely, 2^{1131031510225} is an apocalyptic number.

It is an amenable number.

1131031510225 is a deficient number, since it is larger than the sum of its proper divisors (271468528715).

1131031510225 is an equidigital number, since it uses as much as digits as its factorization.

1131031510225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676340 (or 676335 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 1131031510225 its reverse (5220151301311), we get a palindrome (6351182811536).

The spelling of 1131031510225 in words is "one trillion, one hundred thirty-one billion, thirty-one million, five hundred ten thousand, two hundred twenty-five".