22861549 has 4 divisors (see below), whose sum is σ = 24206364. Its totient is φ = 21516736.

The previous prime is 22861547. The next prime is 22861561. The reversal of 22861549 is 94516822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94516822 = 2 ⋅47258411.

It can be written as a sum of positive squares in 2 ways, for example, as 10562500 + 12299049 = 3250^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 22861549 - 2¹ = 22861547 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 (22861547) 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, 672382 + ... + 672415.

It is an arithmetic number, because the mean of its divisors is an integer number (6051591).

Almost surely, 2^22861549 is an apocalyptic number.

It is an amenable number.

22861549 is a deficient number, since it is larger than the sum of its proper divisors (1344815).

22861549 is a wasteful number, since it uses less digits than its factorization.

22861549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344814.

The product of its digits is 34560, while the sum is 37.

The square root of 22861549 is about 4781.3752205825. The cubic root of 22861549 is about 283.8149169330.

The spelling of 22861549 in words is "twenty-two million, eight hundred sixty-one thousand, five hundred forty-nine".