131516643 has 16 divisors (see below), whose sum is σ = 180252576. Its totient is φ = 85244160.

The previous prime is 131516639. The next prime is 131516647. The reversal of 131516643 is 346615131.

It is an interprime number because it is at equal distance from previous prime (131516639) and next prime (131516647).

It is not a de Polignac number, because 131516643 - 2² = 131516639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131516643.

It is not an unprimeable number, because it can be changed into a prime (131516647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37305 + ... + 40677.

It is an arithmetic number, because the mean of its divisors is an integer number (11265786).

Almost surely, 2^131516643 is an apocalyptic number.

131516643 is a deficient number, since it is larger than the sum of its proper divisors (48735933).

131516643 is a wasteful number, since it uses less digits than its factorization.

131516643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734.

The product of its digits is 6480, while the sum is 30.

The square root of 131516643 is about 11468.0705875051. The cubic root of 131516643 is about 508.5420916168.

The spelling of 131516643 in words is "one hundred thirty-one million, five hundred sixteen thousand, six hundred forty-three".