23031321 has 8 divisors (see below), whose sum is σ = 30980640. Its totient is φ = 15218112.

The previous prime is 23031319. The next prime is 23031329. The reversal of 23031321 is 12313032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23031321 - 2¹ = 23031319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23031321.

It is not an unprimeable number, because it can be changed into a prime (23031329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33631 + ... + 34308.

It is an arithmetic number, because the mean of its divisors is an integer number (3872580).

Almost surely, 2^23031321 is an apocalyptic number.

It is an amenable number.

23031321 is a deficient number, since it is larger than the sum of its proper divisors (7949319).

23031321 is a wasteful number, since it uses less digits than its factorization.

23031321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68055.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 23031321 is about 4799.0958523455. The cubic root of 23031321 is about 284.5157303847.

Adding to 23031321 its reverse (12313032), we get a palindrome (35344353).

The spelling of 23031321 in words is "twenty-three million, thirty-one thousand, three hundred twenty-one".