22361291 has 4 divisors (see below), whose sum is σ = 23132400. Its totient is φ = 21590184.

The previous prime is 22361281. The next prime is 22361293. The reversal of 22361291 is 19216322.

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 22361291 - 2¹⁰ = 22360267 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 22361291.

It is not an unprimeable number, because it can be changed into a prime (22361293) 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, 385511 + ... + 385568.

It is an arithmetic number, because the mean of its divisors is an integer number (5783100).

Almost surely, 2^22361291 is an apocalyptic number.

22361291 is a deficient number, since it is larger than the sum of its proper divisors (771109).

22361291 is an equidigital number, since it uses as much as digits as its factorization.

22361291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771108.

The product of its digits is 1296, while the sum is 26.

The square root of 22361291 is about 4728.7726737495. The cubic root of 22361291 is about 281.7294783455.

The spelling of 22361291 in words is "twenty-two million, three hundred sixty-one thousand, two hundred ninety-one".