22015549 has 8 divisors (see below), whose sum is σ = 22780160. Its totient is φ = 21276540.

The previous prime is 22015541. The next prime is 22015583. The reversal of 22015549 is 94551022.

It is not a de Polignac number, because 22015549 - 2³ = 22015541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22015541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29422 + ... + 30160.

It is an arithmetic number, because the mean of its divisors is an integer number (2847520).

Almost surely, 2^22015549 is an apocalyptic number.

It is an amenable number.

22015549 is a deficient number, since it is larger than the sum of its proper divisors (764611).

22015549 is an frugal number, since it uses more digits than its factorization.

22015549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 22015549 is about 4692.0729960221. The cubic root of 22015549 is about 280.2699310188.

It can be divided in two parts, 2201 and 5549, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 22015549 in words is "twenty-two million, fifteen thousand, five hundred forty-nine".