131630211 has 8 divisors (see below), whose sum is σ = 195007760. Its totient is φ = 87753456.

The previous prime is 131630207. The next prime is 131630231. The reversal of 131630211 is 112036131.

131630211 is a `hidden beast` number, since 1 + 31 + 630 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 131630211 - 2² = 131630207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131630231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2437570 + ... + 2437623.

It is an arithmetic number, because the mean of its divisors is an integer number (24375970).

Almost surely, 2^131630211 is an apocalyptic number.

131630211 is a deficient number, since it is larger than the sum of its proper divisors (63377549).

131630211 is an equidigital number, since it uses as much as digits as its factorization.

131630211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875202 (or 4875196 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 131630211 is about 11473.0210058206. The cubic root of 131630211 is about 508.6884292231.

Adding to 131630211 its reverse (112036131), we get a palindrome (243666342).

It can be divided in two parts, 131630 and 211, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 131630211 in words is "one hundred thirty-one million, six hundred thirty thousand, two hundred eleven".