131564291 has 2 divisors, whose sum is σ = 131564292. Its totient is φ = 131564290.

The previous prime is 131564261. The next prime is 131564297. The reversal of 131564291 is 192465131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131564291 - 2²² = 127369987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131564297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65782145 + 65782146.

It is an arithmetic number, because the mean of its divisors is an integer number (65782146).

Almost surely, 2^131564291 is an apocalyptic number.

131564291 is a deficient number, since it is larger than the sum of its proper divisors (1).

131564291 is an equidigital number, since it uses as much as digits as its factorization.

131564291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 131564291 is about 11470.1478194485. The cubic root of 131564291 is about 508.6034985165.

The spelling of 131564291 in words is "one hundred thirty-one million, five hundred sixty-four thousand, two hundred ninety-one".