16624501 has 2 divisors, whose sum is σ = 16624502. Its totient is φ = 16624500.

The previous prime is 16624481. The next prime is 16624519. The reversal of 16624501 is 10542661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16443025 + 181476 = 4055^2 + 426^2 .

It is an emirp because it is prime and its reverse (10542661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16624501 - 2¹⁵ = 16591733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16624541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8312250 + 8312251.

It is an arithmetic number, because the mean of its divisors is an integer number (8312251).

Almost surely, 2^16624501 is an apocalyptic number.

It is an amenable number.

16624501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16624501 is an equidigital number, since it uses as much as digits as its factorization.

16624501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 16624501 is about 4077.3154158098. The cubic root of 16624501 is about 255.2208825608.

The spelling of 16624501 in words is "sixteen million, six hundred twenty-four thousand, five hundred one".