22211240 has 32 divisors (see below), whose sum is σ = 50923080. Its totient is φ = 8716032.

The previous prime is 22211219. The next prime is 22211249. The reversal of 22211240 is 4211222.

It can be written as a sum of positive squares in 4 ways, for example, as 21215236 + 996004 = 4606^2 + 998^2 .

It is not an unprimeable number, because it can be changed into a prime (22211249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3119 + ... + 7358.

Almost surely, 2^22211240 is an apocalyptic number.

22211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211240 is an abundant number, since it is smaller than the sum of its proper divisors (28711840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22211240 is a wasteful number, since it uses less digits than its factorization.

22211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10541 (or 10537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22211240 is about 4712.8802233878. The cubic root of 22211240 is about 281.0979003109.

Adding to 22211240 its reverse (4211222), we get a palindrome (26422462).

The spelling of 22211240 in words is "twenty-two million, two hundred eleven thousand, two hundred forty".