131288225 has 6 divisors (see below), whose sum is σ = 162797430. Its totient is φ = 105030560.

The previous prime is 131288207. The next prime is 131288231. The reversal of 131288225 is 522882131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24641296 + 106646929 = 4964^2 + 10327^2 .

It is not a de Polignac number, because 131288225 - 2⁸ = 131287969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131288191 and 131288200.

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, 2625740 + ... + 2625789.

It is an arithmetic number, because the mean of its divisors is an integer number (27132905).

Almost surely, 2^131288225 is an apocalyptic number.

It is an amenable number.

131288225 is a deficient number, since it is larger than the sum of its proper divisors (31509205).

131288225 is an equidigital number, since it uses as much as digits as its factorization.

131288225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251539 (or 5251534 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 131288225 is about 11458.1073917118. The cubic root of 131288225 is about 508.2475091752.

The spelling of 131288225 in words is "one hundred thirty-one million, two hundred eighty-eight thousand, two hundred twenty-five".