22101722 has 4 divisors (see below), whose sum is σ = 33152586. Its totient is φ = 11050860.

The previous prime is 22101721. The next prime is 22101727. The reversal of 22101722 is 22710122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16394401 + 5707321 = 4049^2 + 2389^2 .

It is a super-2 number, since 2×22101722² = 976972230730568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22101722.

It is not an unprimeable number, because it can be changed into a prime (22101721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525429 + ... + 5525432.

Almost surely, 2^22101722 is an apocalyptic number.

22101722 is a deficient number, since it is larger than the sum of its proper divisors (11050864).

22101722 is a wasteful number, since it uses less digits than its factorization.

22101722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050863.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 22101722 is about 4701.2468558883. The cubic root of 22101722 is about 280.6351313548.

Adding to 22101722 its reverse (22710122), we get a palindrome (44811844).

Subtracting 22101722 from its reverse (22710122), we obtain a square (608400 = 780²).

The spelling of 22101722 in words is "twenty-two million, one hundred one thousand, seven hundred twenty-two".