22215100 has 18 divisors (see below), whose sum is σ = 48206984. Its totient is φ = 8886000.

The previous prime is 22215091. The next prime is 22215101. The reversal of 22215100 is 151222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215101) 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, 110976 + ... + 111175.

Almost surely, 2^22215100 is an apocalyptic number.

22215100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22215100 is an abundant number, since it is smaller than the sum of its proper divisors (25991884).

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

22215100 is a wasteful number, since it uses less digits than its factorization.

22215100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222165 (or 222158 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 22215100 is about 4713.2897216276. The cubic root of 22215100 is about 281.1141829835.

Adding to 22215100 its reverse (151222), we get a palindrome (22366322).

The spelling of 22215100 in words is "twenty-two million, two hundred fifteen thousand, one hundred".