131355961 has 8 divisors (see below), whose sum is σ = 143486784. Its totient is φ = 119256720.

The previous prime is 131355953. The next prime is 131355977. The reversal of 131355961 is 169553131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131355961 - 2³ = 131355953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131355941) 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, 1276 + ... + 16258.

It is an arithmetic number, because the mean of its divisors is an integer number (17935848).

Almost surely, 2^131355961 is an apocalyptic number.

131355961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131355961 is a deficient number, since it is larger than the sum of its proper divisors (12130823).

131355961 is a wasteful number, since it uses less digits than its factorization.

131355961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791.

The product of its digits is 12150, while the sum is 34.

The square root of 131355961 is about 11461.0628215711. The cubic root of 131355961 is about 508.3349014613.

The spelling of 131355961 in words is "one hundred thirty-one million, three hundred fifty-five thousand, nine hundred sixty-one".