923221231 has 4 divisors (see below), whose sum is σ = 945738864. Its totient is φ = 900703600.

The previous prime is 923221147. The next prime is 923221241. The reversal of 923221231 is 132122329.

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 923221231 - 2⁹ = 923220719 is a prime.

It is a super-2 number, since 2×923221231² = 1704674882738310722, 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 = 923221196 and 923221205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11258755 + ... + 11258836.

It is an arithmetic number, because the mean of its divisors is an integer number (236434716).

Almost surely, 2^923221231 is an apocalyptic number.

923221231 is a deficient number, since it is larger than the sum of its proper divisors (22517633).

923221231 is a wasteful number, since it uses less digits than its factorization.

923221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22517632.

The product of its digits is 1296, while the sum is 25.

The square root of 923221231 is about 30384.5557973126. Note that the first 3 decimals coincide. The cubic root of 923221231 is about 973.7226247287.

The spelling of 923221231 in words is "nine hundred twenty-three million, two hundred twenty-one thousand, two hundred thirty-one".