16138511 has 2 divisors, whose sum is σ = 16138512. Its totient is φ = 16138510.

The previous prime is 16138481. The next prime is 16138517. The reversal of 16138511 is 11583161.

16138511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16138511 - 2¹⁰ = 16137487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16138517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069255 + 8069256.

It is an arithmetic number, because the mean of its divisors is an integer number (8069256).

Almost surely, 2^16138511 is an apocalyptic number.

16138511 is a deficient number, since it is larger than the sum of its proper divisors (1).

16138511 is an equidigital number, since it uses as much as digits as its factorization.

16138511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 26.

The square root of 16138511 is about 4017.2765650376. The cubic root of 16138511 is about 252.7092589377.

The spelling of 16138511 in words is "sixteen million, one hundred thirty-eight thousand, five hundred eleven".