131220325 has 12 divisors (see below), whose sum is σ = 163114560. Its totient is φ = 104717360.

The previous prime is 131220293. The next prime is 131220329. The reversal of 131220325 is 523022131.

It is not a de Polignac number, because 131220325 - 2⁵ = 131220293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131220329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4212 + ... + 16738.

It is an arithmetic number, because the mean of its divisors is an integer number (13592880).

Almost surely, 2^131220325 is an apocalyptic number.

It is an amenable number.

131220325 is a deficient number, since it is larger than the sum of its proper divisors (31894235).

131220325 is a wasteful number, since it uses less digits than its factorization.

131220325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956 (or 12951 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 131220325 is about 11455.1440409975. The cubic root of 131220325 is about 508.1598751245.

Adding to 131220325 its reverse (523022131), we get a palindrome (654242456).

The spelling of 131220325 in words is "one hundred thirty-one million, two hundred twenty thousand, three hundred twenty-five".