22139287 has 8 divisors (see below), whose sum is σ = 23544000. Its totient is φ = 20745984.

The previous prime is 22139269. The next prime is 22139297. The reversal of 22139287 is 78293122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22139287 - 2¹¹ = 22137239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139297) 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 7 ways as a sum of consecutive naturals, for example, 1339 + ... + 6787.

It is an arithmetic number, because the mean of its divisors is an integer number (2943000).

Almost surely, 2^22139287 is an apocalyptic number.

22139287 is a deficient number, since it is larger than the sum of its proper divisors (1404713).

22139287 is a wasteful number, since it uses less digits than its factorization.

22139287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705.

The product of its digits is 12096, while the sum is 34.

The square root of 22139287 is about 4705.2403764314. The cubic root of 22139287 is about 280.7940343846.

The spelling of 22139287 in words is "twenty-two million, one hundred thirty-nine thousand, two hundred eighty-seven".