131533225 has 12 divisors (see below), whose sum is σ = 165337756. Its totient is φ = 103783680.

The previous prime is 131533211. The next prime is 131533253. The reversal of 131533225 is 522335131.

It can be written as a sum of positive squares in 6 ways, for example, as 4227136 + 127306089 = 2056^2 + 11283^2 .

It is not a de Polignac number, because 131533225 - 2¹⁷ = 131402153 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131533225.

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, 34212 + ... + 37861.

Almost surely, 2^131533225 is an apocalyptic number.

It is an amenable number.

131533225 is a deficient number, since it is larger than the sum of its proper divisors (33804531).

131533225 is an equidigital number, since it uses as much as digits as its factorization.

131533225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72156 (or 72151 counting only the distinct ones).

The product of its digits is 2700, while the sum is 25.

The square root of 131533225 is about 11468.7935285278. The cubic root of 131533225 is about 508.5634635395.

Adding to 131533225 its reverse (522335131), we get a palindrome (653868356).

The spelling of 131533225 in words is "one hundred thirty-one million, five hundred thirty-three thousand, two hundred twenty-five".