22280991 has 8 divisors (see below), whose sum is σ = 29762304. Its totient is φ = 14826840.

The previous prime is 22280989. The next prime is 22281023. The reversal of 22280991 is 19908222.

It is a happy number.

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

It is not a de Polignac number, because 22280991 - 2¹ = 22280989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22280981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4791 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (3720288).

Almost surely, 2^22280991 is an apocalyptic number.

22280991 is a deficient number, since it is larger than the sum of its proper divisors (7481313).

22280991 is a wasteful number, since it uses less digits than its factorization.

22280991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13581.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 22280991 is about 4720.2744623592. The cubic root of 22280991 is about 281.3918411454.

The spelling of 22280991 in words is "twenty-two million, two hundred eighty thousand, nine hundred ninety-one".