131515861061 has 8 divisors (see below), whose sum is σ = 146201255424. Its totient is φ = 117483150960.

The previous prime is 131515861051. The next prime is 131515861063. The reversal of 131515861061 is 160168515131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131515861061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131515861063) 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, 163170641 + ... + 163171446.

It is an arithmetic number, because the mean of its divisors is an integer number (18275156928).

Almost surely, 2^131515861061 is an apocalyptic number.

It is an amenable number.

131515861061 is a deficient number, since it is larger than the sum of its proper divisors (14685394363).

131515861061 is a wasteful number, since it uses less digits than its factorization.

131515861061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326342131.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 131515861061 in words is "one hundred thirty-one billion, five hundred fifteen million, eight hundred sixty-one thousand, sixty-one".