22877221 has 4 divisors (see below), whose sum is σ = 23435244. Its totient is φ = 22319200.

The previous prime is 22877177. The next prime is 22877233. The reversal of 22877221 is 12277822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2528100 + 20349121 = 1590^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 22877221 - 2⁷ = 22877093 is a prime.

It is a super-3 number, since 3×22877221³ (a number of 23 digits) contains 333 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 (22877521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278950 + ... + 279031.

It is an arithmetic number, because the mean of its divisors is an integer number (5858811).

Almost surely, 2^22877221 is an apocalyptic number.

It is an amenable number.

22877221 is a deficient number, since it is larger than the sum of its proper divisors (558023).

22877221 is an equidigital number, since it uses as much as digits as its factorization.

22877221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558022.

The product of its digits is 6272, while the sum is 31.

The square root of 22877221 is about 4783.0137988511. The cubic root of 22877221 is about 283.8797555168.

The spelling of 22877221 in words is "twenty-two million, eight hundred seventy-seven thousand, two hundred twenty-one".