22221493 has 4 divisors (see below), whose sum is σ = 25396000. Its totient is φ = 19046988.

The previous prime is 22221491. The next prime is 22221517. The reversal of 22221493 is 39412222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22221493 - 2¹ = 22221491 is a prime.

It is a super-2 number, since 2×22221493² = 987589502298098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1587243 + ... + 1587256.

It is an arithmetic number, because the mean of its divisors is an integer number (6349000).

Almost surely, 2^22221493 is an apocalyptic number.

It is an amenable number.

22221493 is a deficient number, since it is larger than the sum of its proper divisors (3174507).

22221493 is an equidigital number, since it uses as much as digits as its factorization.

22221493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174506.

The product of its digits is 1728, while the sum is 25.

The square root of 22221493 is about 4713.9678615790. The cubic root of 22221493 is about 281.1411464844.

The spelling of 22221493 in words is "twenty-two million, two hundred twenty-one thousand, four hundred ninety-three".