16825881 has 4 divisors (see below), whose sum is σ = 22434512. Its totient is φ = 11217252.

The previous prime is 16825877. The next prime is 16825889. The reversal of 16825881 is 18852861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16825881 - 2² = 16825877 is a prime.

It is a super-2 number, since 2×16825881² = 566220542852322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16825889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804311 + ... + 2804316.

It is an arithmetic number, because the mean of its divisors is an integer number (5608628).

Almost surely, 2^16825881 is an apocalyptic number.

It is an amenable number.

16825881 is a deficient number, since it is larger than the sum of its proper divisors (5608631).

16825881 is an equidigital number, since it uses as much as digits as its factorization.

16825881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608630.

The product of its digits is 30720, while the sum is 39.

The square root of 16825881 is about 4101.9362501141. The cubic root of 16825881 is about 256.2472840482.

The spelling of 16825881 in words is "sixteen million, eight hundred twenty-five thousand, eight hundred eighty-one".