22015442 has 24 divisors (see below), whose sum is σ = 35974260. Its totient is φ = 10096640.

The previous prime is 22015417. The next prime is 22015447. The reversal of 22015442 is 24451022.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4618201 + 17397241 = 2149^2 + 4171^2 .

It is not an unprimeable number, because it can be changed into a prime (22015447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23234 + ... + 24162.

Almost surely, 2^22015442 is an apocalyptic number.

22015442 is a deficient number, since it is larger than the sum of its proper divisors (13958818).

22015442 is a wasteful number, since it uses less digits than its factorization.

22015442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 22015442 is about 4692.0615937986. The cubic root of 22015442 is about 280.2694769620.

Adding to 22015442 its reverse (24451022), we get a palindrome (46466464).

The spelling of 22015442 in words is "twenty-two million, fifteen thousand, four hundred forty-two".