131022225 has 48 divisors (see below), whose sum is σ = 244081600. Its totient is φ = 68895360.

The previous prime is 131022187. The next prime is 131022259. The reversal of 131022225 is 522220131.

It is not a de Polignac number, because 131022225 - 2⁷ = 131022097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131022198 and 131022207.

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 47 ways as a sum of consecutive naturals, for example, 47946 + ... + 50604.

Almost surely, 2^131022225 is an apocalyptic number.

131022225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131022225 is a deficient number, since it is larger than the sum of its proper divisors (113059375).

131022225 is a wasteful number, since it uses less digits than its factorization.

131022225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 131022225 is about 11446.4940047160. The cubic root of 131022225 is about 507.9040276363.

Adding to 131022225 its reverse (522220131), we get a palindrome (653242356).

The spelling of 131022225 in words is "one hundred thirty-one million, twenty-two thousand, two hundred twenty-five".