22401943 has 4 divisors (see below), whose sum is σ = 22531608. Its totient is φ = 22272280.

The previous prime is 22401889. The next prime is 22401947. The reversal of 22401943 is 34910422.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22401943 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 (22401947) 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, 64573 + ... + 64918.

It is an arithmetic number, because the mean of its divisors is an integer number (5632902).

Almost surely, 2^22401943 is an apocalyptic number.

22401943 is a deficient number, since it is larger than the sum of its proper divisors (129665).

22401943 is a wasteful number, since it uses less digits than its factorization.

22401943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129664.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22401943 is about 4733.0690888682. The cubic root of 22401943 is about 281.9000995835.

The spelling of 22401943 in words is "twenty-two million, four hundred one thousand, nine hundred forty-three".