22000391 has 8 divisors (see below), whose sum is σ = 25728384. Its totient is φ = 18418680.

The previous prime is 22000387. The next prime is 22000399. The reversal of 22000391 is 19300022.

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

It is not a de Polignac number, because 22000391 - 2² = 22000387 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 (22000399) 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, 36245 + ... + 36846.

It is an arithmetic number, because the mean of its divisors is an integer number (3216048).

Almost surely, 2^22000391 is an apocalyptic number.

22000391 is a deficient number, since it is larger than the sum of its proper divisors (3727993).

22000391 is an equidigital number, since it uses as much as digits as its factorization.

22000391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73141.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 22000391 is about 4690.4574403783. The cubic root of 22000391 is about 280.2055930517.

The spelling of 22000391 in words is "twenty-two million, three hundred ninety-one", and thus it is an aban number.