16553413 has 2 divisors, whose sum is σ = 16553414. Its totient is φ = 16553412.

The previous prime is 16553363. The next prime is 16553443. The reversal of 16553413 is 31435561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 1014049 = 3942^2 + 1007^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16553413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16553443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8276706 + 8276707.

It is an arithmetic number, because the mean of its divisors is an integer number (8276707).

Almost surely, 2^16553413 is an apocalyptic number.

It is an amenable number.

16553413 is a deficient number, since it is larger than the sum of its proper divisors (1).

16553413 is an equidigital number, since it uses as much as digits as its factorization.

16553413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 16553413 is about 4068.5885759069. The cubic root of 16553413 is about 254.8565796097.

Adding to 16553413 its reverse (31435561), we get a palindrome (47988974).

The spelling of 16553413 in words is "sixteen million, five hundred fifty-three thousand, four hundred thirteen".