22513398 has 16 divisors (see below), whose sum is σ = 45372096. Its totient is φ = 7446920.

The previous prime is 22513391. The next prime is 22513399. The reversal of 22513398 is 89331522.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22513391) 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, 13536 + ... + 15107.

It is an arithmetic number, because the mean of its divisors is an integer number (2835756).

Almost surely, 2^22513398 is an apocalyptic number.

22513398 is an abundant number, since it is smaller than the sum of its proper divisors (22858698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22513398 is a wasteful number, since it uses less digits than its factorization.

22513398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28779.

The product of its digits is 12960, while the sum is 33.

The square root of 22513398 is about 4744.8285532778. The cubic root of 22513398 is about 282.3668331043.

The spelling of 22513398 in words is "twenty-two million, five hundred thirteen thousand, three hundred ninety-eight".