16218801 has 12 divisors (see below), whose sum is σ = 24235380. Its totient is φ = 10439520.

The previous prime is 16218793. The next prime is 16218803. The reversal of 16218801 is 10881261.

It can be written as a sum of positive squares in 2 ways, for example, as 11553201 + 4665600 = 3399^2 + 2160^2 .

It is not a de Polignac number, because 16218801 - 2³ = 16218793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16218803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30810 + ... + 31331.

It is an arithmetic number, because the mean of its divisors is an integer number (2019615).

Almost surely, 2^16218801 is an apocalyptic number.

It is an amenable number.

16218801 is a deficient number, since it is larger than the sum of its proper divisors (8016579).

16218801 is a wasteful number, since it uses less digits than its factorization.

16218801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62176 (or 62173 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 16218801 is about 4027.2572552545. The cubic root of 16218801 is about 253.1276467945.

The spelling of 16218801 in words is "sixteen million, two hundred eighteen thousand, eight hundred one".