16221547403 has 2 divisors, whose sum is σ = 16221547404. Its totient is φ = 16221547402.

The previous prime is 16221547367. The next prime is 16221547409. The reversal of 16221547403 is 30474512261.

It is a strong prime.

It is an emirp because it is prime and its reverse (30474512261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16221547403 - 2¹⁶ = 16221481867 is a prime.

It is not a weakly prime, because it can be changed into another prime (16221547409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110773701 + 8110773702.

It is an arithmetic number, because the mean of its divisors is an integer number (8110773702).

Almost surely, 2^16221547403 is an apocalyptic number.

16221547403 is a deficient number, since it is larger than the sum of its proper divisors (1).

16221547403 is an equidigital number, since it uses as much as digits as its factorization.

16221547403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 16221547403 in words is "sixteen billion, two hundred twenty-one million, five hundred forty-seven thousand, four hundred three".