131562866 has 4 divisors (see below), whose sum is σ = 197344302. Its totient is φ = 65781432.

The previous prime is 131562841. The next prime is 131562877. The reversal of 131562866 is 668265131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668265131 = 19 ⋅35171849.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 50112241 = 9025^2 + 7079^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32890715 + ... + 32890718.

Almost surely, 2^131562866 is an apocalyptic number.

131562866 is a deficient number, since it is larger than the sum of its proper divisors (65781436).

131562866 is an equidigital number, since it uses as much as digits as its factorization.

131562866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65781435.

The product of its digits is 51840, while the sum is 38.

The square root of 131562866 is about 11470.0857015107. The cubic root of 131562866 is about 508.6016622467.

The spelling of 131562866 in words is "one hundred thirty-one million, five hundred sixty-two thousand, eight hundred sixty-six".