131620225 has 24 divisors (see below), whose sum is σ = 179720640. Its totient is φ = 94824000.

The previous prime is 131620219. The next prime is 131620243. The reversal of 131620225 is 522026131.

It is not a de Polignac number, because 131620225 - 2³ = 131620217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131620196 and 131620205.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27780 + ... + 32170.

It is an arithmetic number, because the mean of its divisors is an integer number (7488360).

Almost surely, 2^131620225 is an apocalyptic number.

It is an amenable number.

131620225 is a deficient number, since it is larger than the sum of its proper divisors (48100415).

131620225 is a wasteful number, since it uses less digits than its factorization.

131620225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4516 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131620225 is about 11472.5858026863. The cubic root of 131620225 is about 508.6755651775.

Adding to 131620225 its reverse (522026131), we get a palindrome (653646356).

The spelling of 131620225 in words is "one hundred thirty-one million, six hundred twenty thousand, two hundred twenty-five".