131225317 has 2 divisors, whose sum is σ = 131225318. Its totient is φ = 131225316.

The previous prime is 131225309. The next prime is 131225321. The reversal of 131225317 is 713522131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92275236 + 38950081 = 9606^2 + 6241^2 .

It is a cyclic number.

It is not a de Polignac number, because 131225317 - 2³ = 131225309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131225291 and 131225300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131225357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65612658 + 65612659.

It is an arithmetic number, because the mean of its divisors is an integer number (65612659).

Almost surely, 2^131225317 is an apocalyptic number.

It is an amenable number.

131225317 is a deficient number, since it is larger than the sum of its proper divisors (1).

131225317 is an equidigital number, since it uses as much as digits as its factorization.

131225317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 131225317 is about 11455.3619323005. The cubic root of 131225317 is about 508.1663189990.

Adding to 131225317 its reverse (713522131), we get a palindrome (844747448).

The spelling of 131225317 in words is "one hundred thirty-one million, two hundred twenty-five thousand, three hundred seventeen".