22220743 has 4 divisors (see below), whose sum is σ = 22236688. Its totient is φ = 22204800.

The previous prime is 22220741. The next prime is 22220753. The reversal of 22220743 is 34702222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34702222 = 2 ⋅17351111.

It is a cyclic number.

It is not a de Polignac number, because 22220743 - 2¹ = 22220741 is a prime.

It is a super-2 number, since 2×22220743² = 987522838944098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220741) 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, 5658 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (5559172).

Almost surely, 2^22220743 is an apocalyptic number.

22220743 is a deficient number, since it is larger than the sum of its proper divisors (15945).

22220743 is a wasteful number, since it uses less digits than its factorization.

22220743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15944.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 22220743 is about 4713.8883100897. Note that the first 3 decimals coincide. The cubic root of 22220743 is about 281.1379835071.

Adding to 22220743 its reverse (34702222), we get a palindrome (56922965).

The spelling of 22220743 in words is "twenty-two million, two hundred twenty thousand, seven hundred forty-three".