22121759 has 4 divisors (see below), whose sum is σ = 24132840. Its totient is φ = 20110680.

The previous prime is 22121717. The next prime is 22121761. The reversal of 22121759 is 95712122.

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 22121759 - 2⁸ = 22121503 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 (22121779) 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 3 ways as a sum of consecutive naturals, for example, 1005524 + ... + 1005545.

It is an arithmetic number, because the mean of its divisors is an integer number (6033210).

Almost surely, 2^22121759 is an apocalyptic number.

22121759 is a deficient number, since it is larger than the sum of its proper divisors (2011081).

22121759 is a wasteful number, since it uses less digits than its factorization.

22121759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011080.

The product of its digits is 2520, while the sum is 29.

The square root of 22121759 is about 4703.3774035261. The cubic root of 22121759 is about 280.7199118939.

The spelling of 22121759 in words is "twenty-two million, one hundred twenty-one thousand, seven hundred fifty-nine".