16513361 has 2 divisors, whose sum is σ = 16513362. Its totient is φ = 16513360.

The previous prime is 16513351. The next prime is 16513363. The reversal of 16513361 is 16331561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120400 + 7392961 = 3020^2 + 2719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16513361 is a prime.

It is a Sophie Germain prime.

Together with 16513363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16513361.

It is not a weakly prime, because it can be changed into another prime (16513363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256680 + 8256681.

It is an arithmetic number, because the mean of its divisors is an integer number (8256681).

Almost surely, 2^16513361 is an apocalyptic number.

It is an amenable number.

16513361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16513361 is an equidigital number, since it uses as much as digits as its factorization.

16513361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 16513361 is about 4063.6634949267. The cubic root of 16513361 is about 254.6508665566.

The spelling of 16513361 in words is "sixteen million, five hundred thirteen thousand, three hundred sixty-one".