22217442 has 16 divisors (see below), whose sum is σ = 47853120. Its totient is φ = 6836112.

The previous prime is 22217431. The next prime is 22217443. The reversal of 22217442 is 24471222.

It is a super-2 number, since 2×22217442² = 987229458046728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22217443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142342 + ... + 142497.

It is an arithmetic number, because the mean of its divisors is an integer number (2990820).

Almost surely, 2^22217442 is an apocalyptic number.

22217442 is an abundant number, since it is smaller than the sum of its proper divisors (25635678).

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

22217442 is a wasteful number, since it uses less digits than its factorization.

22217442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284857.

The product of its digits is 1792, while the sum is 24.

The square root of 22217442 is about 4713.5381615088. The cubic root of 22217442 is about 281.1240613438.

Adding to 22217442 its reverse (24471222), we get a palindrome (46688664).

The spelling of 22217442 in words is "twenty-two million, two hundred seventeen thousand, four hundred forty-two".