16533149 has 2 divisors, whose sum is σ = 16533150. Its totient is φ = 16533148.

The previous prime is 16533133. The next prime is 16533169. The reversal of 16533149 is 94133561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 3880900 = 3557^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 16533149 - 2⁴ = 16533133 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 (16533109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8266574 + 8266575.

It is an arithmetic number, because the mean of its divisors is an integer number (8266575).

Almost surely, 2^16533149 is an apocalyptic number.

It is an amenable number.

16533149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16533149 is an equidigital number, since it uses as much as digits as its factorization.

16533149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 16533149 is about 4066.0975148169. The cubic root of 16533149 is about 254.7525422022.

The spelling of 16533149 in words is "sixteen million, five hundred thirty-three thousand, one hundred forty-nine".