22219581 has 8 divisors (see below), whose sum is σ = 30348864. Its totient is φ = 14451680.

The previous prime is 22219559. The next prime is 22219583. The reversal of 22219581 is 18591222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22219581 - 2¹⁰ = 22218557 is a prime.

It is a super-2 number, since 2×22219581² = 987419559631122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22219583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90201 + ... + 90446.

It is an arithmetic number, because the mean of its divisors is an integer number (3793608).

Almost surely, 2^22219581 is an apocalyptic number.

It is an amenable number.

22219581 is a deficient number, since it is larger than the sum of its proper divisors (8129283).

22219581 is a wasteful number, since it uses less digits than its factorization.

22219581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180691.

The product of its digits is 2880, while the sum is 30.

The square root of 22219581 is about 4713.7650556641. The cubic root of 22219581 is about 281.1330828604.

The spelling of 22219581 in words is "twenty-two million, two hundred nineteen thousand, five hundred eighty-one".