22331845 has 8 divisors (see below), whose sum is σ = 26825976. Its totient is φ = 17846976.

The previous prime is 22331833. The next prime is 22331849. The reversal of 22331845 is 54813322.

It can be written as a sum of positive squares in 4 ways, for example, as 16176484 + 6155361 = 4022^2 + 2481^2 .

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 22331845 - 2⁷ = 22331717 is a prime.

It is a super-2 number, since 2×22331845² = 997422602208050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22331849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5239 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (3353247).

Almost surely, 2^22331845 is an apocalyptic number.

It is an amenable number.

22331845 is a deficient number, since it is larger than the sum of its proper divisors (4494131).

22331845 is a wasteful number, since it uses less digits than its factorization.

22331845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631.

The product of its digits is 5760, while the sum is 28.

The square root of 22331845 is about 4725.6581552203. The cubic root of 22331845 is about 281.6057608274.

It can be divided in two parts, 2233 and 1845, that multiplied together give a triangular number (4119885 = T₂₈₇₀).

The spelling of 22331845 in words is "twenty-two million, three hundred thirty-one thousand, eight hundred forty-five".