22272531 has 8 divisors (see below), whose sum is σ = 29723904. Its totient is φ = 14834760.

The previous prime is 22272521. The next prime is 22272577. The reversal of 22272531 is 13527222.

It is a happy number.

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

It is not a de Polignac number, because 22272531 - 2⁷ = 22272403 is a prime.

It is a super-2 number, since 2×22272531² = 992131274291922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22272521) by changing a digit.

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, 1386 + ... + 6816.

It is an arithmetic number, because the mean of its divisors is an integer number (3715488).

Almost surely, 2^22272531 is an apocalyptic number.

22272531 is a deficient number, since it is larger than the sum of its proper divisors (7451373).

22272531 is a wasteful number, since it uses less digits than its factorization.

22272531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801.

The product of its digits is 1680, while the sum is 24.

The square root of 22272531 is about 4719.3782429468. The cubic root of 22272531 is about 281.3562221981.

Adding to 22272531 its reverse (13527222), we get a palindrome (35799753).

The spelling of 22272531 in words is "twenty-two million, two hundred seventy-two thousand, five hundred thirty-one".