131220206 has 16 divisors (see below), whose sum is σ = 212906400. Its totient is φ = 60295968.

The previous prime is 131220197. The next prime is 131220223. The reversal of 131220206 is 602022131.

It is a Curzon number.

It is a congruent number.

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, 5066 + ... + 16973.

It is an arithmetic number, because the mean of its divisors is an integer number (13306650).

Almost surely, 2^131220206 is an apocalyptic number.

131220206 is a deficient number, since it is larger than the sum of its proper divisors (81686194).

131220206 is a wasteful number, since it uses less digits than its factorization.

131220206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22283.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131220206 is about 11455.1388468233. The cubic root of 131220206 is about 508.1597215125.

Adding to 131220206 its reverse (602022131), we get a palindrome (733242337).

The spelling of 131220206 in words is "one hundred thirty-one million, two hundred twenty thousand, two hundred six".