22147091 has 8 divisors (see below), whose sum is σ = 23159040. Its totient is φ = 21139272.

The previous prime is 22147079. The next prime is 22147109. The reversal of 22147091 is 19074122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22147091 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 22147091.

It is not an unprimeable number, because it can be changed into a prime (22147031) 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 7 ways as a sum of consecutive naturals, for example, 16346 + ... + 17648.

It is an arithmetic number, because the mean of its divisors is an integer number (2894880).

Almost surely, 2^22147091 is an apocalyptic number.

22147091 is the 2516-th centered heptagonal number.

22147091 is a deficient number, since it is larger than the sum of its proper divisors (1011949).

22147091 is a wasteful number, since it uses less digits than its factorization.

22147091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 22147091 is about 4706.0695914956. The cubic root of 22147091 is about 280.8270233907.

The spelling of 22147091 in words is "twenty-two million, one hundred forty-seven thousand, ninety-one".