22155849 has 15 divisors (see below), whose sum is σ = 33160413. Its totient is φ = 14742324.

The previous prime is 22155841. The next prime is 22155863. The reversal of 22155849 is 94855122.

The square root of 22155849 is 4707.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 22155849 - 2³ = 22155841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22155841) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 42102 + ... + 42624.

Almost surely, 2^22155849 is an apocalyptic number.

22155849 is the 4707-th square number.

22155849 is the 2354-th centered octagonal number.

It is an amenable number.

22155849 is a deficient number, since it is larger than the sum of its proper divisors (11004564).

22155849 is an frugal number, since it uses more digits than its factorization.

22155849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 526 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The cubic root of 22155849 is about 280.8640359106.

Multiplying 22155849 by its sum of digits (36), we get a square (797610564 = 28242²).

The spelling of 22155849 in words is "twenty-two million, one hundred fifty-five thousand, eight hundred forty-nine".