131209955 has 16 divisors (see below), whose sum is σ = 162173664. Its totient is φ = 101836800.

The previous prime is 131209951. The next prime is 131209957. The reversal of 131209955 is 559902131.

It is not a de Polignac number, because 131209955 - 2² = 131209951 is a prime.

It is a super-2 number, since 2×131209955² = 34432104582204050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131209951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81155 + ... + 82755.

It is an arithmetic number, because the mean of its divisors is an integer number (10135854).

Almost surely, 2^131209955 is an apocalyptic number.

131209955 is a deficient number, since it is larger than the sum of its proper divisors (30963709).

131209955 is a wasteful number, since it uses less digits than its factorization.

131209955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 131209955 is about 11454.6913969779. The cubic root of 131209955 is about 508.1464885887.

The spelling of 131209955 in words is "one hundred thirty-one million, two hundred nine thousand, nine hundred fifty-five".