22541881 has 4 divisors (see below), whose sum is σ = 23867892. Its totient is φ = 21215872.

The previous prime is 22541837. The next prime is 22541891. The reversal of 22541881 is 18814522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 8970025 = 3684^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 22541881 - 2¹³ = 22533689 is a prime.

It is a super-2 number, since 2×22541881² = 1016272798036322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22541891) 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, 662980 + ... + 663013.

It is an arithmetic number, because the mean of its divisors is an integer number (5966973).

Almost surely, 2^22541881 is an apocalyptic number.

It is an amenable number.

22541881 is a deficient number, since it is larger than the sum of its proper divisors (1326011).

22541881 is a wasteful number, since it uses less digits than its factorization.

22541881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326010.

The product of its digits is 5120, while the sum is 31.

The square root of 22541881 is about 4747.8290828546. The cubic root of 22541881 is about 282.4858624507.

The spelling of 22541881 in words is "twenty-two million, five hundred forty-one thousand, eight hundred eighty-one".