131218484 has 24 divisors (see below), whose sum is σ = 243079200. Its totient is φ = 61806240.

The previous prime is 131218459. The next prime is 131218523. The reversal of 131218484 is 484812131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 131218484.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8987 + ... + 18525.

It is an arithmetic number, because the mean of its divisors is an integer number (10128300).

Almost surely, 2^131218484 is an apocalyptic number.

It is an amenable number.

131218484 is a deficient number, since it is larger than the sum of its proper divisors (111860716).

131218484 is a wasteful number, since it uses less digits than its factorization.

131218484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9743 (or 9741 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 131218484 is about 11455.0636838038. The cubic root of 131218484 is about 508.1574986464.

The spelling of 131218484 in words is "one hundred thirty-one million, two hundred eighteen thousand, four hundred eighty-four".