22131332 has 6 divisors (see below), whose sum is σ = 38729838. Its totient is φ = 11065664.

The previous prime is 22131289. The next prime is 22131397. The reversal of 22131332 is 23313122.

It can be written as a sum of positive squares in only one way, i.e., 21381376 + 749956 = 4624^2 + 866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22131332.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2766413 + ... + 2766420.

It is an arithmetic number, because the mean of its divisors is an integer number (6454973).

Almost surely, 2^22131332 is an apocalyptic number.

It is an amenable number.

22131332 is a deficient number, since it is larger than the sum of its proper divisors (16598506).

22131332 is a wasteful number, since it uses less digits than its factorization.

22131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532837 (or 5532835 counting only the distinct ones).

The product of its digits is 216, while the sum is 17.

The square root of 22131332 is about 4704.3949664117. The cubic root of 22131332 is about 280.7603990928.

Adding to 22131332 its reverse (23313122), we get a palindrome (45444454).

The spelling of 22131332 in words is "twenty-two million, one hundred thirty-one thousand, three hundred thirty-two".