1231055225 has 6 divisors (see below), whose sum is σ = 1526508510. Its totient is φ = 984844160.

The previous prime is 1231055219. The next prime is 1231055251. The reversal of 1231055225 is 5225501321.

It can be written as a sum of positive squares in 3 ways, for example, as 169338169 + 1061717056 = 13013^2 + 32584^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1231055225 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231055194 and 1231055203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24621080 + ... + 24621129.

It is an arithmetic number, because the mean of its divisors is an integer number (254418085).

Almost surely, 2^1231055225 is an apocalyptic number.

It is an amenable number.

1231055225 is a deficient number, since it is larger than the sum of its proper divisors (295453285).

1231055225 is an equidigital number, since it uses as much as digits as its factorization.

1231055225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49242219 (or 49242214 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1231055225 is about 35086.3965804413. The cubic root of 1231055225 is about 1071.7475809233.

Adding to 1231055225 its reverse (5225501321), we get a palindrome (6456556546).

The spelling of 1231055225 in words is "one billion, two hundred thirty-one million, fifty-five thousand, two hundred twenty-five".