22791549 has 16 divisors (see below), whose sum is σ = 33609024. Its totient is φ = 13622400.

The previous prime is 22791529. The next prime is 22791557. The reversal of 22791549 is 94519722.

It is not a de Polignac number, because 22791549 - 2⁹ = 22791037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22791529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2322 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (2100564).

Almost surely, 2^22791549 is an apocalyptic number.

It is an amenable number.

22791549 is a deficient number, since it is larger than the sum of its proper divisors (10817475).

22791549 is a wasteful number, since it uses less digits than its factorization.

22791549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548.

The product of its digits is 45360, while the sum is 39.

The square root of 22791549 is about 4774.0495389135. The cubic root of 22791549 is about 283.5249488913.

It can be divided in two parts, 2279 and 1549, that added together give a triangular number (3828 = T₈₇).

The spelling of 22791549 in words is "twenty-two million, seven hundred ninety-one thousand, five hundred forty-nine".