22752181 has 4 divisors (see below), whose sum is σ = 22790272. Its totient is φ = 22714092.

The previous prime is 22752167. The next prime is 22752193. The reversal of 22752181 is 18125722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18125722 = 2 ⋅9062861.

It is a cyclic number.

It is not a de Polignac number, because 22752181 - 2¹⁹ = 22227893 is a prime.

It is a super-3 number, since 3×22752181³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22752161) 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, 18135 + ... + 19348.

It is an arithmetic number, because the mean of its divisors is an integer number (5697568).

Almost surely, 2^22752181 is an apocalyptic number.

It is an amenable number.

22752181 is a deficient number, since it is larger than the sum of its proper divisors (38091).

22752181 is an equidigital number, since it uses as much as digits as its factorization.

22752181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38090.

The product of its digits is 2240, while the sum is 28.

The square root of 22752181 is about 4769.9246325283. The cubic root of 22752181 is about 283.3616099422.

The spelling of 22752181 in words is "twenty-two million, seven hundred fifty-two thousand, one hundred eighty-one".