22221004 has 12 divisors (see below), whose sum is σ = 41878144. Its totient is φ = 10255824.

The previous prime is 22220987. The next prime is 22221007. The reversal of 22221004 is 40012222.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (22221007) 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, 213612 + ... + 213715.

Almost surely, 2^22221004 is an apocalyptic number.

It is an amenable number.

22221004 is a deficient number, since it is larger than the sum of its proper divisors (19657140).

22221004 is a wasteful number, since it uses less digits than its factorization.

22221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427344 (or 427342 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22221004 is about 4713.9159941603. The cubic root of 22221004 is about 281.1390842313.

Adding to 22221004 its reverse (40012222), we get a palindrome (62233226).

The spelling of 22221004 in words is "twenty-two million, two hundred twenty-one thousand, four".