22150000 has 60 divisors (see below), whose sum is σ = 53762184. Its totient is φ = 8840000.

The previous prime is 22149977. The next prime is 22150001. The reversal of 22150000 is 5122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22150001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49779 + ... + 50221.

Almost surely, 2^22150000 is an apocalyptic number.

22150000 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 22150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26881092).

22150000 is an abundant number, since it is smaller than the sum of its proper divisors (31612184).

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

22150000 is an frugal number, since it uses more digits than its factorization.

22150000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 22150000 is about 4706.3786503000. The cubic root of 22150000 is about 280.8393183093.

Adding to 22150000 its reverse (5122), we get a palindrome (22155122).

The spelling of 22150000 in words is "twenty-two million, one hundred fifty thousand".