22191939 has 48 divisors (see below), whose sum is σ = 41293824. Its totient is φ = 11145600.

The previous prime is 22191937. The next prime is 22191977. The reversal of 22191939 is 93919122.

It is a happy number.

It is not a de Polignac number, because 22191939 - 2¹ = 22191937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22191937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20967 + ... + 21999.

It is an arithmetic number, because the mean of its divisors is an integer number (860288).

Almost surely, 2^22191939 is an apocalyptic number.

22191939 is a deficient number, since it is larger than the sum of its proper divisors (19101885).

22191939 is a wasteful number, since it uses less digits than its factorization.

22191939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1085 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 22191939 is about 4710.8320921043. The cubic root of 22191939 is about 281.0164544174.

The spelling of 22191939 in words is "twenty-two million, one hundred ninety-one thousand, nine hundred thirty-nine".