22151839 has 4 divisors (see below), whose sum is σ = 22168224. Its totient is φ = 22135456.

The previous prime is 22151819. The next prime is 22151869. The reversal of 22151839 is 93815122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22151839 - 2¹⁷ = 22020767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22151839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5962 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (5542056).

Almost surely, 2^22151839 is an apocalyptic number.

22151839 is a deficient number, since it is larger than the sum of its proper divisors (16385).

22151839 is a wasteful number, since it uses less digits than its factorization.

22151839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16384.

The product of its digits is 4320, while the sum is 31.

The square root of 22151839 is about 4706.5740193903. The cubic root of 22151839 is about 280.8470903065.

The spelling of 22151839 in words is "twenty-two million, one hundred fifty-one thousand, eight hundred thirty-nine".