22633381 has 8 divisors (see below), whose sum is σ = 23316344. Its totient is φ = 21954240.

The previous prime is 22633363. The next prime is 22633433. The reversal of 22633381 is 18333622.

It can be written as a sum of positive squares in 4 ways, for example, as 6713281 + 15920100 = 2591^2 + 3990^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(22633381) divides (22633381-1)³.

It is a cyclic number.

It is not a de Polignac number, because 22633381 - 2⁵ = 22633349 is a prime.

It is a super-2 number, since 2×22633381² = 1024539870982322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22633321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14851 + ... + 16303.

It is an arithmetic number, because the mean of its divisors is an integer number (2914543).

Almost surely, 2^22633381 is an apocalyptic number.

It is an amenable number.

22633381 is a deficient number, since it is larger than the sum of its proper divisors (682963).

22633381 is a wasteful number, since it uses less digits than its factorization.

22633381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911.

The product of its digits is 5184, while the sum is 28.

The square root of 22633381 is about 4757.4553071994. The cubic root of 22633381 is about 282.8675603001.

The spelling of 22633381 in words is "twenty-two million, six hundred thirty-three thousand, three hundred eighty-one".