131566561215 has 8 divisors (see below), whose sum is σ = 210506497968. Its totient is φ = 70168832640.

The previous prime is 131566561213. The next prime is 131566561237. The reversal of 131566561215 is 512165665131.

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

It is not a de Polignac number, because 131566561215 - 2¹ = 131566561213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131566561213) 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, 4385552026 + ... + 4385552055.

It is an arithmetic number, because the mean of its divisors is an integer number (26313312246).

Almost surely, 2^131566561215 is an apocalyptic number.

131566561215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131566561215 is a deficient number, since it is larger than the sum of its proper divisors (78939936753).

131566561215 is an equidigital number, since it uses as much as digits as its factorization.

131566561215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8771104089.

The product of its digits is 162000, while the sum is 42.

The spelling of 131566561215 in words is "one hundred thirty-one billion, five hundred sixty-six million, five hundred sixty-one thousand, two hundred fifteen".