131214999 has 4 divisors (see below), whose sum is σ = 174953336. Its totient is φ = 87476664.

The previous prime is 131214991. The next prime is 131215009. The reversal of 131214999 is 999412131.

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

It is not a de Polignac number, because 131214999 - 2³ = 131214991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131214991) 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, 21869164 + ... + 21869169.

It is an arithmetic number, because the mean of its divisors is an integer number (43738334).

Almost surely, 2^131214999 is an apocalyptic number.

131214999 is a deficient number, since it is larger than the sum of its proper divisors (43738337).

131214999 is an equidigital number, since it uses as much as digits as its factorization.

131214999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43738336.

The product of its digits is 17496, while the sum is 39.

The square root of 131214999 is about 11454.9115666600. The cubic root of 131214999 is about 508.1529999291.

The spelling of 131214999 in words is "one hundred thirty-one million, two hundred fourteen thousand, nine hundred ninety-nine".