131522194 has 4 divisors (see below), whose sum is σ = 197283294. Its totient is φ = 65761096.

The previous prime is 131522191. The next prime is 131522213. The reversal of 131522194 is 491225131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 130256569 + 1265625 = 11413^2 + 1125^2 .

It is not an unprimeable number, because it can be changed into a prime (131522191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32880547 + ... + 32880550.

Almost surely, 2^131522194 is an apocalyptic number.

131522194 is a deficient number, since it is larger than the sum of its proper divisors (65761100).

131522194 is an equidigital number, since it uses as much as digits as its factorization.

131522194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65761099.

The product of its digits is 2160, while the sum is 28.

The square root of 131522194 is about 11468.3126047383. The cubic root of 131522194 is about 508.5492462941.

The spelling of 131522194 in words is "one hundred thirty-one million, five hundred twenty-two thousand, one hundred ninety-four".