15005322421 has 2 divisors, whose sum is σ = 15005322422. Its totient is φ = 15005322420.

The previous prime is 15005322407. The next prime is 15005322439. The reversal of 15005322421 is 12422350051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14706412900 + 298909521 = 121270^2 + 17289^2 .

It is an emirp because it is prime and its reverse (12422350051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15005322421 - 2⁵ = 15005322389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15005322461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7502661210 + 7502661211.

It is an arithmetic number, because the mean of its divisors is an integer number (7502661211).

Almost surely, 2^15005322421 is an apocalyptic number.

It is an amenable number.

15005322421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15005322421 is an equidigital number, since it uses as much as digits as its factorization.

15005322421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 15005322421 its reverse (12422350051), we get a palindrome (27427672472).

The spelling of 15005322421 in words is "fifteen billion, five million, three hundred twenty-two thousand, four hundred twenty-one".