22155100 has 54 divisors (see below), whose sum is σ = 52873352. Its totient is φ = 8052000.

The previous prime is 22155059. The next prime is 22155103. The reversal of 22155100 is 155122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11185 + ... + 13015.

Almost surely, 2^22155100 is an apocalyptic number.

22155100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22155100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26436676).

22155100 is an abundant number, since it is smaller than the sum of its proper divisors (30718252).

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

22155100 is a wasteful number, since it uses less digits than its factorization.

22155100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 22155100 is about 4706.9204369736. The cubic root of 22155100 is about 280.8608709144.

The spelling of 22155100 in words is "twenty-two million, one hundred fifty-five thousand, one hundred".