16216221075 has 24 divisors (see below), whose sum is σ = 26820621168. Its totient is φ = 8645489280.

The previous prime is 16216220989. The next prime is 16216221101. The reversal of 16216221075 is 57012261261.

It is not a de Polignac number, because 16216221075 - 2⁸ = 16216220819 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174669 + ... + 250881.

It is an arithmetic number, because the mean of its divisors is an integer number (1117525882).

Almost surely, 2^16216221075 is an apocalyptic number.

16216221075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16216221075 is a deficient number, since it is larger than the sum of its proper divisors (10604400093).

16216221075 is a wasteful number, since it uses less digits than its factorization.

16216221075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79063 (or 79058 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 16216221075 in words is "sixteen billion, two hundred sixteen million, two hundred twenty-one thousand, seventy-five".