131218371 has 6 divisors (see below), whose sum is σ = 189537660. Its totient is φ = 87478908.

The previous prime is 131218369. The next prime is 131218379. The reversal of 131218371 is 173812131.

It is a happy number.

It is not a de Polignac number, because 131218371 - 2¹ = 131218369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131218379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7289901 + ... + 7289918.

It is an arithmetic number, because the mean of its divisors is an integer number (31589610).

Almost surely, 2^131218371 is an apocalyptic number.

131218371 is a deficient number, since it is larger than the sum of its proper divisors (58319289).

131218371 is a wasteful number, since it uses less digits than its factorization.

131218371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14579825 (or 14579822 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 131218371 is about 11455.0587514862. The cubic root of 131218371 is about 508.1573527781.

It can be divided in two parts, 1312 and 18371, that added together give a 9-th power (19683 = 3⁹).

The spelling of 131218371 in words is "one hundred thirty-one million, two hundred eighteen thousand, three hundred seventy-one".