23211347 has 4 divisors (see below), whose sum is σ = 24220560. Its totient is φ = 22202136.

The previous prime is 23211337. The next prime is 23211361. The reversal of 23211347 is 74311232.

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 23211347 - 2¹⁰ = 23210323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1009189 = 23211347 / (2 + 3 + 2 + 1 + 1 + 3 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23211337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504572 + ... + 504617.

It is an arithmetic number, because the mean of its divisors is an integer number (6055140).

Almost surely, 2^23211347 is an apocalyptic number.

23211347 is a deficient number, since it is larger than the sum of its proper divisors (1009213).

23211347 is a wasteful number, since it uses less digits than its factorization.

23211347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009212.

The product of its digits is 1008, while the sum is 23.

The square root of 23211347 is about 4817.8155838513. The cubic root of 23211347 is about 285.2551198717.

Adding to 23211347 its reverse (74311232), we get a palindrome (97522579).

The spelling of 23211347 in words is "twenty-three million, two hundred eleven thousand, three hundred forty-seven".