15552001 has 2 divisors, whose sum is σ = 15552002. Its totient is φ = 15552000.

The previous prime is 15551999. The next prime is 15552037. The reversal of 15552001 is 10025551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13068225 + 2483776 = 3615^2 + 1576^2 .

It is an emirp because it is prime and its reverse (10025551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15552001 - 2¹ = 15551999 is a prime.

Together with 15551999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15552001.

It is not a weakly prime, because it can be changed into another prime (15552041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7776000 + 7776001.

It is an arithmetic number, because the mean of its divisors is an integer number (7776001).

Almost surely, 2^15552001 is an apocalyptic number.

It is an amenable number.

15552001 is a deficient number, since it is larger than the sum of its proper divisors (1).

15552001 is an equidigital number, since it uses as much as digits as its factorization.

15552001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 15552001 is about 3943.6025408248. The cubic root of 15552001 is about 249.6100641162.

Adding to 15552001 its reverse (10025551), we get a palindrome (25577552).

The spelling of 15552001 in words is "fifteen million, five hundred fifty-two thousand, one".