131220204 has 24 divisors (see below), whose sum is σ = 314456688. Its totient is φ = 42557760.

The previous prime is 131220197. The next prime is 131220223. The reversal of 131220204 is 402022131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147327 + ... + 148214.

It is an arithmetic number, because the mean of its divisors is an integer number (13102362).

Almost surely, 2^131220204 is an apocalyptic number.

It is an amenable number.

131220204 is an abundant number, since it is smaller than the sum of its proper divisors (183236484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131220204 is a wasteful number, since it uses less digits than its factorization.

131220204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295585 (or 295583 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 131220204 is about 11455.1387595262. The cubic root of 131220204 is about 508.1597189308.

Adding to 131220204 its reverse (402022131), we get a palindrome (533242335).

The spelling of 131220204 in words is "one hundred thirty-one million, two hundred twenty thousand, two hundred four".