131216568 has 32 divisors (see below), whose sum is σ = 374904960. Its totient is φ = 37490400.

The previous prime is 131216567. The next prime is 131216573. The reversal of 131216568 is 865612131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131216563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390358 + ... + 390693.

It is an arithmetic number, because the mean of its divisors is an integer number (11715780).

Almost surely, 2^131216568 is an apocalyptic number.

It is an amenable number.

131216568 is an abundant number, since it is smaller than the sum of its proper divisors (243688392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131216568 is a wasteful number, since it uses less digits than its factorization.

131216568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781067 (or 781063 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 131216568 is about 11454.9800523615. The cubic root of 131216568 is about 508.1550253299.

Adding to 131216568 its reverse (865612131), we get a palindrome (996828699).

The spelling of 131216568 in words is "one hundred thirty-one million, two hundred sixteen thousand, five hundred sixty-eight".