16823261 has 16 divisors (see below), whose sum is σ = 20832000. Its totient is φ = 13229568.

The previous prime is 16823249. The next prime is 16823311. The reversal of 16823261 is 16232861.

It is a cyclic number.

It is not a de Polignac number, because 16823261 - 2¹⁴ = 16806877 is a prime.

It is a super-2 number, since 2×16823261² = 566044221348242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16823221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17645 + ... + 18573.

It is an arithmetic number, because the mean of its divisors is an integer number (1302000).

Almost surely, 2^16823261 is an apocalyptic number.

It is an amenable number.

16823261 is a deficient number, since it is larger than the sum of its proper divisors (4008739).

16823261 is a wasteful number, since it uses less digits than its factorization.

16823261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 3456, while the sum is 29.

The square root of 16823261 is about 4101.6168763062. The cubic root of 16823261 is about 256.2339830560.

The spelling of 16823261 in words is "sixteen million, eight hundred twenty-three thousand, two hundred sixty-one".