22801231 has 4 divisors (see below), whose sum is σ = 22845352. Its totient is φ = 22757112.

The previous prime is 22801201. The next prime is 22801237. The reversal of 22801231 is 13210822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13210822 = 2 ⋅6605411.

It is a cyclic number.

It is not a de Polignac number, because 22801231 - 2⁹ = 22800719 is a prime.

It is a super-2 number, since 2×22801231² = 1039792270230722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22801199 and 22801208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22801237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21276 + ... + 22321.

It is an arithmetic number, because the mean of its divisors is an integer number (5711338).

Almost surely, 2^22801231 is an apocalyptic number.

22801231 is a deficient number, since it is larger than the sum of its proper divisors (44121).

22801231 is an equidigital number, since it uses as much as digits as its factorization.

22801231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44120.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22801231 is about 4775.0634550758. The cubic root of 22801231 is about 283.5650909624.

It can be divided in two parts, 22801 and 231, that added together give a palindrome (23032).

The spelling of 22801231 in words is "twenty-two million, eight hundred one thousand, two hundred thirty-one".