22622821 has 8 divisors (see below), whose sum is σ = 24638040. Its totient is φ = 20646912.

The previous prime is 22622807. The next prime is 22622827. The reversal of 22622821 is 12822622.

It can be written as a sum of positive squares in 4 ways, for example, as 1102500 + 21520321 = 1050^2 + 4639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22622821 - 2⁹ = 22622309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22622827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8620 + ... + 10933.

It is an arithmetic number, because the mean of its divisors is an integer number (3079755).

Almost surely, 2^22622821 is an apocalyptic number.

It is an amenable number.

22622821 is a deficient number, since it is larger than the sum of its proper divisors (2015219).

22622821 is a wasteful number, since it uses less digits than its factorization.

22622821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19655.

The product of its digits is 1536, while the sum is 25.

The square root of 22622821 is about 4756.3453407001. The cubic root of 22622821 is about 282.8235611864.

The spelling of 22622821 in words is "twenty-two million, six hundred twenty-two thousand, eight hundred twenty-one".