131204566 has 4 divisors (see below), whose sum is σ = 196806852. Its totient is φ = 65602282.

The previous prime is 131204537. The next prime is 131204587. The reversal of 131204566 is 665402131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32801140 + ... + 32801143.

It is an arithmetic number, because the mean of its divisors is an integer number (49201713).

Almost surely, 2^131204566 is an apocalyptic number.

131204566 is a deficient number, since it is larger than the sum of its proper divisors (65602286).

131204566 is an equidigital number, since it uses as much as digits as its factorization.

131204566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65602285.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 131204566 is about 11454.4561634326. The cubic root of 131204566 is about 508.1395317006.

Adding to 131204566 its reverse (665402131), we get a palindrome (796606697).

The spelling of 131204566 in words is "one hundred thirty-one million, two hundred four thousand, five hundred sixty-six".