22100231 has 4 divisors (see below), whose sum is σ = 22228152. Its totient is φ = 21972312.

The previous prime is 22100227. The next prime is 22100251. The reversal of 22100231 is 13200122.

It is a happy number.

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 22100231 - 2² = 22100227 is a prime.

It is a super-2 number, since 2×22100231² = 976840420506722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100251) 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, 63701 + ... + 64046.

It is an arithmetic number, because the mean of its divisors is an integer number (5557038).

Almost surely, 2^22100231 is an apocalyptic number.

22100231 is a deficient number, since it is larger than the sum of its proper divisors (127921).

22100231 is a wasteful number, since it uses less digits than its factorization.

22100231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127920.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22100231 is about 4701.0882782607. The cubic root of 22100231 is about 280.6288205888.

Adding to 22100231 its reverse (13200122), we get a palindrome (35300353).

The spelling of 22100231 in words is "twenty-two million, one hundred thousand, two hundred thirty-one".