22261291 has 4 divisors (see below), whose sum is σ = 23973712. Its totient is φ = 20548872.

The previous prime is 22261273. The next prime is 22261297. The reversal of 22261291 is 19216222.

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 22261291 - 2⁷ = 22261163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22261297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856191 + ... + 856216.

It is an arithmetic number, because the mean of its divisors is an integer number (5993428).

Almost surely, 2^22261291 is an apocalyptic number.

22261291 is a deficient number, since it is larger than the sum of its proper divisors (1712421).

22261291 is a wasteful number, since it uses less digits than its factorization.

22261291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712420.

The product of its digits is 864, while the sum is 25.

The square root of 22261291 is about 4718.1872578354. The cubic root of 22261291 is about 281.3088847241.

The spelling of 22261291 in words is "twenty-two million, two hundred sixty-one thousand, two hundred ninety-one".