22142309 has 8 divisors (see below), whose sum is σ = 25341888. Its totient is φ = 18951840.

The previous prime is 22142299. The next prime is 22142327. The reversal of 22142309 is 90324122.

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

It is a cyclic number.

It is not a de Polignac number, because 22142309 - 2⁴ = 22142293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22142359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4154 + ... + 7844.

It is an arithmetic number, because the mean of its divisors is an integer number (3167736).

Almost surely, 2^22142309 is an apocalyptic number.

It is an amenable number.

22142309 is a deficient number, since it is larger than the sum of its proper divisors (3199579).

22142309 is an equidigital number, since it uses as much as digits as its factorization.

22142309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 22142309 is about 4705.5614967823. The cubic root of 22142309 is about 280.8068098783.

The spelling of 22142309 in words is "twenty-two million, one hundred forty-two thousand, three hundred nine".