22211442 has 64 divisors (see below), whose sum is σ = 54817920. Its totient is φ = 6609600.

The previous prime is 22211429. The next prime is 22211447. The reversal of 22211442 is 24411222.

22211442 is a `hidden beast` number, since 2 + 221 + 1 + 442 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22211447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35928 + ... + 36540.

It is an arithmetic number, because the mean of its divisors is an integer number (856530).

Almost surely, 2^22211442 is an apocalyptic number.

22211442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22211442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27408960).

22211442 is an abundant number, since it is smaller than the sum of its proper divisors (32606478).

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

22211442 is a wasteful number, since it uses less digits than its factorization.

22211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 690 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 22211442 is about 4712.9016539707. The cubic root of 22211442 is about 281.0987524561.

Adding to 22211442 its reverse (24411222), we get a palindrome (46622664).

It can be divided in two parts, 2221 and 1442, that added together give a palindrome (3663).

The spelling of 22211442 in words is "twenty-two million, two hundred eleven thousand, four hundred forty-two".