22061231 has 4 divisors (see below), whose sum is σ = 22309200. Its totient is φ = 21813264.

The previous prime is 22061227. The next prime is 22061269. The reversal of 22061231 is 13216022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22061231 - 2² = 22061227 is a prime.

It is a super-2 number, since 2×22061231² = 973395826470722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123851 + ... + 124028.

It is an arithmetic number, because the mean of its divisors is an integer number (5577300).

Almost surely, 2^22061231 is an apocalyptic number.

22061231 is a deficient number, since it is larger than the sum of its proper divisors (247969).

22061231 is an equidigital number, since it uses as much as digits as its factorization.

22061231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247968.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22061231 is about 4696.9384709617. The cubic root of 22061231 is about 280.4636493407.

Adding to 22061231 its reverse (13216022), we get a palindrome (35277253).

The spelling of 22061231 in words is "twenty-two million, sixty-one thousand, two hundred thirty-one".