16473521 has 2 divisors, whose sum is σ = 16473522. Its totient is φ = 16473520.

The previous prime is 16473469. The next prime is 16473533. The reversal of 16473521 is 12537461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 160000 = 4039^2 + 400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16473521 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16473581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8236760 + 8236761.

It is an arithmetic number, because the mean of its divisors is an integer number (8236761).

Almost surely, 2^16473521 is an apocalyptic number.

It is an amenable number.

16473521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16473521 is an equidigital number, since it uses as much as digits as its factorization.

16473521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 16473521 is about 4058.7585540409. The cubic root of 16473521 is about 254.4459121101.

The spelling of 16473521 in words is "sixteen million, four hundred seventy-three thousand, five hundred twenty-one".