131445225 has 36 divisors (see below), whose sum is σ = 236049996. Its totient is φ = 69920640.

The previous prime is 131445203. The next prime is 131445233. The reversal of 131445225 is 522544131.

131445225 is a `hidden beast` number, since 131 + 4 + 4 + 522 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 3732624 + 127712601 = 1932^2 + 11301^2 .

It is not a de Polignac number, because 131445225 - 2¹¹ = 131443177 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 164527 + ... + 165323.

Almost surely, 2^131445225 is an apocalyptic number.

131445225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131445225 is a deficient number, since it is larger than the sum of its proper divisors (104604771).

131445225 is a wasteful number, since it uses less digits than its factorization.

131445225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1538 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 131445225 is about 11464.9563889271. The cubic root of 131445225 is about 508.4500230785.

Adding to 131445225 its reverse (522544131), we get a palindrome (653989356).

The spelling of 131445225 in words is "one hundred thirty-one million, four hundred forty-five thousand, two hundred twenty-five".