22488331 has 4 divisors (see below), whose sum is σ = 23811192. Its totient is φ = 21165472.

The previous prime is 22488329. The next prime is 22488353. The reversal of 22488331 is 13388422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13388422 = 2 ⋅6694211.

It is a cyclic number.

It is not a de Polignac number, because 22488331 - 2¹ = 22488329 is a prime.

It is a super-2 number, since 2×22488331² = 1011450062331122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22488293 and 22488302.

It is not an unprimeable number, because it can be changed into a prime (22488391) 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, 661405 + ... + 661438.

It is an arithmetic number, because the mean of its divisors is an integer number (5952798).

Almost surely, 2^22488331 is an apocalyptic number.

22488331 is a deficient number, since it is larger than the sum of its proper divisors (1322861).

22488331 is a wasteful number, since it uses less digits than its factorization.

22488331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322860.

The product of its digits is 9216, while the sum is 31.

The square root of 22488331 is about 4742.1863101316. The cubic root of 22488331 is about 282.2619960052.

Subtracting from 22488331 its reverse (13388422), we obtain a palindrome (9099909).

The spelling of 22488331 in words is "twenty-two million, four hundred eighty-eight thousand, three hundred thirty-one".