16792221 has 4 divisors (see below), whose sum is σ = 22389632. Its totient is φ = 11194812.

The previous prime is 16792201. The next prime is 16792229. The reversal of 16792221 is 12229761.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12229761 = 3 ⋅4076587.

It is not a de Polignac number, because 16792221 - 2¹⁰ = 16791197 is a prime.

It is a super-2 number, since 2×16792221² = 563957372225682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16792229) 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, 2798701 + ... + 2798706.

It is an arithmetic number, because the mean of its divisors is an integer number (5597408).

Almost surely, 2^16792221 is an apocalyptic number.

It is an amenable number.

16792221 is a deficient number, since it is larger than the sum of its proper divisors (5597411).

16792221 is an equidigital number, since it uses as much as digits as its factorization.

16792221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597410.

The product of its digits is 3024, while the sum is 30.

The square root of 16792221 is about 4097.8312556766. The cubic root of 16792221 is about 256.0762966354.

The spelling of 16792221 in words is "sixteen million, seven hundred ninety-two thousand, two hundred twenty-one".