16227081 has 32 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 9847872.

The previous prime is 16227077. The next prime is 16227089. The reversal of 16227081 is 18072261.

It is not a de Polignac number, because 16227081 - 2² = 16227077 is a prime.

It is a super-2 number, since 2×16227081² = 526636315561122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16227089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28855 + ... + 29411.

It is an arithmetic number, because the mean of its divisors is an integer number (820260).

Almost surely, 2^16227081 is an apocalyptic number.

It is an amenable number.

16227081 is a deficient number, since it is larger than the sum of its proper divisors (10021239).

16227081 is a wasteful number, since it uses less digits than its factorization.

16227081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 16227081 is about 4028.2851190054. The cubic root of 16227081 is about 253.1707149257.

The spelling of 16227081 in words is "sixteen million, two hundred twenty-seven thousand, eighty-one".