22215294 has 48 divisors (see below), whose sum is σ = 53660880. Its totient is φ = 6600960.

The previous prime is 22215293. The next prime is 22215299. The reversal of 22215294 is 49251222.

22215294 = T₅₂ + T₅₃ + ... + T₅₁₀.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3904 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (1117935).

Almost surely, 2^22215294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22215294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26830440).

22215294 is an abundant number, since it is smaller than the sum of its proper divisors (31445586).

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

22215294 is a wasteful number, since it uses less digits than its factorization.

22215294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865 (or 3862 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 22215294 is about 4713.3103016882. The cubic root of 22215294 is about 281.1150012857.

The spelling of 22215294 in words is "twenty-two million, two hundred fifteen thousand, two hundred ninety-four".