131620722361 has 32 divisors (see below), whose sum is σ = 144950674176. Its totient is φ = 119008512000.

The previous prime is 131620722353. The next prime is 131620722413. The reversal of 131620722361 is 163227026131.

It is a cyclic number.

It is not a de Polignac number, because 131620722361 - 2³ = 131620722353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131620723361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77743231 + ... + 77744923.

It is an arithmetic number, because the mean of its divisors is an integer number (4529708568).

Almost surely, 2^131620722361 is an apocalyptic number.

It is an amenable number.

131620722361 is a deficient number, since it is larger than the sum of its proper divisors (13329951815).

131620722361 is a wasteful number, since it uses less digits than its factorization.

131620722361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393.

The product of its (nonzero) digits is 18144, while the sum is 34.

Adding to 131620722361 its reverse (163227026131), we get a palindrome (294847748492).

The spelling of 131620722361 in words is "one hundred thirty-one billion, six hundred twenty million, seven hundred twenty-two thousand, three hundred sixty-one".