22101400 has 48 divisors (see below), whose sum is σ = 52284600. Its totient is φ = 8686080.

The previous prime is 22101349. The next prime is 22101433. The reversal of 22101400 is 410122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10864 + ... + 12736.

Almost surely, 2^22101400 is an apocalyptic number.

22101400 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 22101400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26142300).

22101400 is an abundant number, since it is smaller than the sum of its proper divisors (30183200).

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

22101400 is a wasteful number, since it uses less digits than its factorization.

22101400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22101400 is about 4701.2126095296. The cubic root of 22101400 is about 280.6337684904.

Adding to 22101400 its reverse (410122), we get a palindrome (22511522).

The spelling of 22101400 in words is "twenty-two million, one hundred one thousand, four hundred".