22420191 has 4 divisors (see below), whose sum is σ = 29893592. Its totient is φ = 14946792.

The previous prime is 22420183. The next prime is 22420201. The reversal of 22420191 is 19102422.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22420191 - 2³ = 22420183 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 (22420141) 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, 3736696 + ... + 3736701.

It is an arithmetic number, because the mean of its divisors is an integer number (7473398).

Almost surely, 2^22420191 is an apocalyptic number.

22420191 is a deficient number, since it is larger than the sum of its proper divisors (7473401).

22420191 is an equidigital number, since it uses as much as digits as its factorization.

22420191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7473400.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 22420191 is about 4734.9964097135. The cubic root of 22420191 is about 281.9766214712.

The spelling of 22420191 in words is "twenty-two million, four hundred twenty thousand, one hundred ninety-one".