22873581 has 24 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 14747616.

The previous prime is 22873579. The next prime is 22873583. The reversal of 22873581 is 18537822.

22873581 is a `hidden beast` number, since 2 + 2 + 8 + 73 + 581 = 666.

It is an interprime number because it is at equal distance from previous prime (22873579) and next prime (22873583).

It is not a de Polignac number, because 22873581 - 2¹ = 22873579 is a prime.

It is a super-2 number, since 2×22873581² = 1046401415527122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22873583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37380 + ... + 37986.

It is an arithmetic number, because the mean of its divisors is an integer number (1422720).

Almost surely, 2^22873581 is an apocalyptic number.

It is an amenable number.

22873581 is a deficient number, since it is larger than the sum of its proper divisors (11271699).

22873581 is a wasteful number, since it uses less digits than its factorization.

22873581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 22873581 is about 4782.6332704902. The cubic root of 22873581 is about 283.8646986601.

The spelling of 22873581 in words is "twenty-two million, eight hundred seventy-three thousand, five hundred eighty-one".