22318072 has 32 divisors (see below), whose sum is σ = 48002400. Its totient is φ = 9529344.

The previous prime is 22318013. The next prime is 22318099. The reversal of 22318072 is 27081322.

It is a super-3 number, since 3×22318072³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19204 + ... + 20332.

It is an arithmetic number, because the mean of its divisors is an integer number (1500075).

Almost surely, 2^22318072 is an apocalyptic number.

It is an amenable number.

22318072 is an abundant number, since it is smaller than the sum of its proper divisors (25684328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22318072 is a wasteful number, since it uses less digits than its factorization.

22318072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 22318072 is about 4724.2006731298. The cubic root of 22318072 is about 281.5478561660.

Adding to 22318072 its reverse (27081322), we get a palindrome (49399394).

The spelling of 22318072 in words is "twenty-two million, three hundred eighteen thousand, seventy-two".