22007156 has 24 divisors (see below), whose sum is σ = 39781896. Its totient is φ = 10644480.

The previous prime is 22007123. The next prime is 22007173. The reversal of 22007156 is 65170022.

It can be written as a sum of positive squares in 4 ways, for example, as 4080400 + 17926756 = 2020^2 + 4234^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35360 + ... + 35976.

It is an arithmetic number, because the mean of its divisors is an integer number (1657579).

Almost surely, 2^22007156 is an apocalyptic number.

It is an amenable number.

22007156 is a deficient number, since it is larger than the sum of its proper divisors (17774740).

22007156 is a wasteful number, since it uses less digits than its factorization.

22007156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 22007156 is about 4691.1785299645. The cubic root of 22007156 is about 280.2343106713.

Adding to 22007156 its reverse (65170022), we get a palindrome (87177178).

The spelling of 22007156 in words is "twenty-two million, seven thousand, one hundred fifty-six".