131312563 has 4 divisors (see below), whose sum is σ = 133272520. Its totient is φ = 129352608.

The previous prime is 131312527. The next prime is 131312567. The reversal of 131312563 is 365213131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131312563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131312567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979878 + ... + 980011.

It is an arithmetic number, because the mean of its divisors is an integer number (33318130).

Almost surely, 2^131312563 is an apocalyptic number.

131312563 is a deficient number, since it is larger than the sum of its proper divisors (1959957).

131312563 is an equidigital number, since it uses as much as digits as its factorization.

131312563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959956.

The product of its digits is 1620, while the sum is 25.

The square root of 131312563 is about 11459.1693852565. The cubic root of 131312563 is about 508.2789132700.

Adding to 131312563 its reverse (365213131), we get a palindrome (496525694).

The spelling of 131312563 in words is "one hundred thirty-one million, three hundred twelve thousand, five hundred sixty-three".