22511122 has 4 divisors (see below), whose sum is σ = 33766686. Its totient is φ = 11255560.

The previous prime is 22511119. The next prime is 22511123. The reversal of 22511122 is 22111522.

It is a happy number.

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., 13920361 + 8590761 = 3731^2 + 2931^2 .

It is a super-2 number, since 2×22511122² = 1013501227397768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22511096 and 22511105.

It is not an unprimeable number, because it can be changed into a prime (22511123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5627779 + ... + 5627782.

Almost surely, 2^22511122 is an apocalyptic number.

22511122 is a deficient number, since it is larger than the sum of its proper divisors (11255564).

22511122 is a wasteful number, since it uses less digits than its factorization.

22511122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11255563.

The product of its digits is 80, while the sum is 16.

The square root of 22511122 is about 4744.5887071484. The cubic root of 22511122 is about 282.3573174584.

Adding to 22511122 its reverse (22111522), we get a palindrome (44622644).

The spelling of 22511122 in words is "twenty-two million, five hundred eleven thousand, one hundred twenty-two".