16131499 has 2 divisors, whose sum is σ = 16131500. Its totient is φ = 16131498.

The previous prime is 16131497. The next prime is 16131503. The reversal of 16131499 is 99413161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16131499 - 2¹ = 16131497 is a prime.

Together with 16131497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16131497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8065749 + 8065750.

It is an arithmetic number, because the mean of its divisors is an integer number (8065750).

Almost surely, 2^16131499 is an apocalyptic number.

16131499 is a deficient number, since it is larger than the sum of its proper divisors (1).

16131499 is an equidigital number, since it uses as much as digits as its factorization.

16131499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 16131499 is about 4016.4037396656. The cubic root of 16131499 is about 252.6726538667.

The spelling of 16131499 in words is "sixteen million, one hundred thirty-one thousand, four hundred ninety-nine".