22245531 has 64 divisors (see below), whose sum is σ = 39813120. Its totient is φ = 10707840.

The previous prime is 22245521. The next prime is 22245533. The reversal of 22245531 is 13554222.

It is not a de Polignac number, because 22245531 - 2⁶ = 22245467 is a prime.

It is a super-2 number, since 2×22245531² = 989727298943922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22245533) 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 63 ways as a sum of consecutive naturals, for example, 281550 + ... + 281628.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^22245531 is an apocalyptic number.

22245531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22245531 is a deficient number, since it is larger than the sum of its proper divisors (17567589).

22245531 is a wasteful number, since it uses less digits than its factorization.

22245531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its digits is 2400, while the sum is 24.

The square root of 22245531 is about 4716.5168291866. The cubic root of 22245531 is about 281.2424843424.

Adding to 22245531 its reverse (13554222), we get a palindrome (35799753).

It can be divided in two parts, 222 and 45531, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 22245531 in words is "twenty-two million, two hundred forty-five thousand, five hundred thirty-one".