22231031 has 4 divisors (see below), whose sum is σ = 22243200. Its totient is φ = 22218864.

The previous prime is 22230997. The next prime is 22231037. The reversal of 22231031 is 13013222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13013222 = 2 ⋅6506611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22231031 is a prime.

It is a super-2 number, since 2×22231031² = 988437478645922, 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 = 22230997 and 22231015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231037) 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, 2726 + ... + 7203.

It is an arithmetic number, because the mean of its divisors is an integer number (5560800).

Almost surely, 2^22231031 is an apocalyptic number.

22231031 is a deficient number, since it is larger than the sum of its proper divisors (12169).

22231031 is an equidigital number, since it uses as much as digits as its factorization.

22231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 22231031 is about 4714.9794273146. The cubic root of 22231031 is about 281.1813649145.

Adding to 22231031 its reverse (13013222), we get a palindrome (35244253).

The spelling of 22231031 in words is "twenty-two million, two hundred thirty-one thousand, thirty-one".