21773322 has 12 divisors (see below), whose sum is σ = 47175570. Its totient is φ = 7257768.

The previous prime is 21773321. The next prime is 21773327. The reversal of 21773322 is 22337712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21150801 + 622521 = 4599^2 + 789^2 .

It is not an unprimeable number, because it can be changed into a prime (21773321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604797 + ... + 604832.

Almost surely, 2^21773322 is an apocalyptic number.

21773322 is an abundant number, since it is smaller than the sum of its proper divisors (25402248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21773322 is a wasteful number, since it uses less digits than its factorization.

21773322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209637 (or 1209634 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 21773322 is about 4666.1892374828. The cubic root of 21773322 is about 279.2382441051.

The spelling of 21773322 in words is "twenty-one million, seven hundred seventy-three thousand, three hundred twenty-two".