22001722 has 4 divisors (see below), whose sum is σ = 33002586. Its totient is φ = 11000860.

The previous prime is 22001713. The next prime is 22001729. The reversal of 22001722 is 22710022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22710022 = 2 ⋅11355011.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 3606201 = 4289^2 + 1899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22001696 and 22001705.

It is not an unprimeable number, because it can be changed into a prime (22001729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500429 + ... + 5500432.

Almost surely, 2^22001722 is an apocalyptic number.

22001722 is a deficient number, since it is larger than the sum of its proper divisors (11000864).

22001722 is a wasteful number, since it uses less digits than its factorization.

22001722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000863.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 22001722 is about 4690.5993220483. The cubic root of 22001722 is about 280.2112436501.

Adding to 22001722 its reverse (22710022), we get a palindrome (44711744).

The spelling of 22001722 in words is "twenty-two million, one thousand, seven hundred twenty-two".