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16801801 = 40992

16801801 has 3 divisors (see below), whose sum is σ = 16805901. Its totient is φ = 16797702.

The previous prime is 16801793. The next prime is 16801819. The reversal of 16801801 is 10810861.

Multipling 16801801 by its sum of digits (25), we get a square (420045025 = 204952).

It can be divided in two parts, 1680 and 1801, that added together give a square (3481 = 592).

It is a happy number.

The square root of 16801801 is 4099.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 16801801 - 23 = 16801793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16802801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2050 + ... + 6148.

It is an arithmetic number, because the mean of its divisors is an integer number (5601967).

Almost surely, 216801801 is an apocalyptic number.

16801801 is the 4099-th square number.

16801801 is the 2050-th centered octagonal number.

It is an amenable number.

16801801 is a deficient number, since it is larger than the sum of its proper divisors (4100).

16801801 is an frugal number, since it uses more digits than its factorization.

16801801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198 (or 4099 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The cubic root of 16801801 is about 256.1249847462.

The spelling of 16801801 in words is "sixteen million, eight hundred one thousand, eight hundred one".

Divisors: 1 4099 16801801