131201155089 has 9 divisors (see below), whose sum is σ = 189514349193. Its totient is φ = 87466712292.

The previous prime is 131201155087. The next prime is 131201155109. The reversal of 131201155089 is 980551102131.

The square root of 131201155089 is 362217.

It is a perfect power (a square), and thus also a powerful number.

131201155089 is a `hidden beast` number, since 1 + 3 + 1 + 20 + 1 + 1 + 550 + 89 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 131201155089 - 2¹ = 131201155087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131201155087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1026282 + ... + 1147020.

Almost surely, 2^131201155089 is an apocalyptic number.

131201155089 is the 362217-th square number.

131201155089 is the 181109-th centered octagonal number.

It is an amenable number.

131201155089 is a deficient number, since it is larger than the sum of its proper divisors (58313194104).

131201155089 is an frugal number, since it uses more digits than its factorization.

131201155089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241484 (or 120742 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

Multiplying 131201155089 by its sum of digits (36), we get a square (4723241583204 = 2173302²).

The spelling of 131201155089 in words is "one hundred thirty-one billion, two hundred one million, one hundred fifty-five thousand, eighty-nine".