16552961 has 2 divisors, whose sum is σ = 16552962. Its totient is φ = 16552960.

The previous prime is 16552937. The next prime is 16552973. The reversal of 16552961 is 16925561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 231361 = 4040^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 16552961 - 2¹⁴ = 16536577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16552931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8276480 + 8276481.

It is an arithmetic number, because the mean of its divisors is an integer number (8276481).

Almost surely, 2^16552961 is an apocalyptic number.

It is an amenable number.

16552961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16552961 is an equidigital number, since it uses as much as digits as its factorization.

16552961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 16552961 is about 4068.5330280090. The cubic root of 16552961 is about 254.8542599224.

The spelling of 16552961 in words is "sixteen million, five hundred fifty-two thousand, nine hundred sixty-one".