22531993 has 8 divisors (see below), whose sum is σ = 24667776. Its totient is φ = 20410800.

The previous prime is 22531991. The next prime is 22532017. The reversal of 22531993 is 39913522.

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

It is a cyclic number.

It is not a de Polignac number, because 22531993 - 2¹ = 22531991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22531991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (3083472).

Almost surely, 2^22531993 is an apocalyptic number.

It is an amenable number.

22531993 is a deficient number, since it is larger than the sum of its proper divisors (2135783).

22531993 is a wasteful number, since it uses less digits than its factorization.

22531993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its digits is 14580, while the sum is 34.

The square root of 22531993 is about 4746.7876506117. The cubic root of 22531993 is about 282.4445522524. Note that the first 3 decimals are identical.

The spelling of 22531993 in words is "twenty-two million, five hundred thirty-one thousand, nine hundred ninety-three".