16553279 has 2 divisors, whose sum is σ = 16553280. Its totient is φ = 16553278.

The previous prime is 16553249. The next prime is 16553281. The reversal of 16553279 is 97235561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16553279 is a prime.

It is a super-2 number, since 2×16553279² = 548022091303682, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 16553281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16553209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8276639 + 8276640.

It is an arithmetic number, because the mean of its divisors is an integer number (8276640).

Almost surely, 2^16553279 is an apocalyptic number.

16553279 is a deficient number, since it is larger than the sum of its proper divisors (1).

16553279 is an equidigital number, since it uses as much as digits as its factorization.

16553279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 16553279 is about 4068.5721082463. The cubic root of 16553279 is about 254.8558919192.

The spelling of 16553279 in words is "sixteen million, five hundred fifty-three thousand, two hundred seventy-nine".