22320572 has 6 divisors (see below), whose sum is σ = 39061008. Its totient is φ = 11160284.

The previous prime is 22320563. The next prime is 22320587. The reversal of 22320572 is 27502322.

It is a super-3 number, since 3×22320572³ (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 as a sum of consecutive naturals, namely, 2790068 + ... + 2790075.

It is an arithmetic number, because the mean of its divisors is an integer number (6510168).

Almost surely, 2^22320572 is an apocalyptic number.

It is an amenable number.

22320572 is a deficient number, since it is larger than the sum of its proper divisors (16740436).

22320572 is a wasteful number, since it uses less digits than its factorization.

22320572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580147 (or 5580145 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 22320572 is about 4724.4652607464. The cubic root of 22320572 is about 281.5583684743.

Adding to 22320572 its reverse (27502322), we get a palindrome (49822894).

The spelling of 22320572 in words is "twenty-two million, three hundred twenty thousand, five hundred seventy-two".