1231316225 has 6 divisors (see below), whose sum is σ = 1526832150. Its totient is φ = 985052960.

The previous prime is 1231316209. The next prime is 1231316231. The reversal of 1231316225 is 5226131321.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 350176369 + 881139856 = 18713^2 + 29684^2 .

It is not a de Polignac number, because 1231316225 - 2⁴ = 1231316209 is a prime.

It is a super-2 number, since 2×1231316225² = 3032279291896501250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231316194 and 1231316203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24626300 + ... + 24626349.

It is an arithmetic number, because the mean of its divisors is an integer number (254472025).

Almost surely, 2^1231316225 is an apocalyptic number.

It is an amenable number.

1231316225 is a deficient number, since it is larger than the sum of its proper divisors (295515925).

1231316225 is an equidigital number, since it uses as much as digits as its factorization.

1231316225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49252659 (or 49252654 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1231316225 is about 35090.1157735337. The cubic root of 1231316225 is about 1071.8233171283.

Adding to 1231316225 its reverse (5226131321), we get a palindrome (6457447546).

The spelling of 1231316225 in words is "one billion, two hundred thirty-one million, three hundred sixteen thousand, two hundred twenty-five".