22891249 has 4 divisors (see below), whose sum is σ = 22900900. Its totient is φ = 22881600.

The previous prime is 22891241. The next prime is 22891273. The reversal of 22891249 is 94219822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1795600 + 21095649 = 1340^2 + 4593^2 .

It is a cyclic number.

It is not a de Polignac number, because 22891249 - 2³ = 22891241 is a prime.

It is a super-3 number, since 3×22891249³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22891241) 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, 1477 + ... + 6925.

It is an arithmetic number, because the mean of its divisors is an integer number (5725225).

Almost surely, 2^22891249 is an apocalyptic number.

It is an amenable number.

22891249 is a deficient number, since it is larger than the sum of its proper divisors (9651).

22891249 is an equidigital number, since it uses as much as digits as its factorization.

22891249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650.

The product of its digits is 20736, while the sum is 37.

The square root of 22891249 is about 4784.4800135438. The cubic root of 22891249 is about 283.9377673929.

The spelling of 22891249 in words is "twenty-two million, eight hundred ninety-one thousand, two hundred forty-nine".