131451534566 has 16 divisors (see below), whose sum is σ = 215108103168. Its totient is φ = 59749144200.

The previous prime is 131451534547. The next prime is 131451534583. The reversal of 131451534566 is 665435154131.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499831 + ... + 1585053.

It is an arithmetic number, because the mean of its divisors is an integer number (13444256448).

Almost surely, 2^131451534566 is an apocalyptic number.

131451534566 is a deficient number, since it is larger than the sum of its proper divisors (83656568602).

131451534566 is a wasteful number, since it uses less digits than its factorization.

131451534566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155347.

The product of its digits is 648000, while the sum is 44.

Adding to 131451534566 its reverse (665435154131), we get a palindrome (796886688697).

The spelling of 131451534566 in words is "one hundred thirty-one billion, four hundred fifty-one million, five hundred thirty-four thousand, five hundred sixty-six".