131561101 has 8 divisors (see below), whose sum is σ = 151761600. Its totient is φ = 111712128.

The previous prime is 131561071. The next prime is 131561107. The reversal of 131561101 is 101165131.

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

It is a cyclic number.

It is not a de Polignac number, because 131561101 - 2⁵ = 131561069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131561107) 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, 87076 + ... + 88573.

It is an arithmetic number, because the mean of its divisors is an integer number (18970200).

Almost surely, 2^131561101 is an apocalyptic number.

It is an amenable number.

131561101 is a deficient number, since it is larger than the sum of its proper divisors (20200499).

131561101 is a wasteful number, since it uses less digits than its factorization.

131561101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175763.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 131561101 is about 11470.0087619844. The cubic root of 131561101 is about 508.5993878310.

The spelling of 131561101 in words is "one hundred thirty-one million, five hundred sixty-one thousand, one hundred one".