16503061 has 2 divisors, whose sum is σ = 16503062. Its totient is φ = 16503060.

The previous prime is 16503043. The next prime is 16503089. The reversal of 16503061 is 16030561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11350161 + 5152900 = 3369^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 16503061 - 2⁷ = 16502933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16503031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8251530 + 8251531.

It is an arithmetic number, because the mean of its divisors is an integer number (8251531).

Almost surely, 2^16503061 is an apocalyptic number.

It is an amenable number.

16503061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16503061 is an equidigital number, since it uses as much as digits as its factorization.

16503061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 16503061 is about 4062.3959678987. The cubic root of 16503061 is about 254.5979104594.

The spelling of 16503061 in words is "sixteen million, five hundred three thousand, sixty-one".