131787213 has 32 divisors (see below), whose sum is σ = 190206720. Its totient is φ = 80870400.

The previous prime is 131787209. The next prime is 131787221. The reversal of 131787213 is 312787131.

It is not a de Polignac number, because 131787213 - 2² = 131787209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131787233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 839331 + ... + 839487.

It is an arithmetic number, because the mean of its divisors is an integer number (5943960).

Almost surely, 2^131787213 is an apocalyptic number.

It is an amenable number.

131787213 is a deficient number, since it is larger than the sum of its proper divisors (58419507).

131787213 is a wasteful number, since it uses less digits than its factorization.

131787213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its digits is 7056, while the sum is 33.

The square root of 131787213 is about 11479.8611925406. The cubic root of 131787213 is about 508.8905949928.

The spelling of 131787213 in words is "one hundred thirty-one million, seven hundred eighty-seven thousand, two hundred thirteen".