23111047 has 4 divisors (see below), whose sum is σ = 23456056. Its totient is φ = 22766040.

The previous prime is 23111029. The next prime is 23111069. The reversal of 23111047 is 74011132.

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 23111047 - 2²³ = 14722439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23111447) 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, 172404 + ... + 172537.

It is an arithmetic number, because the mean of its divisors is an integer number (5864014).

Almost surely, 2^23111047 is an apocalyptic number.

23111047 is a deficient number, since it is larger than the sum of its proper divisors (345009).

23111047 is an equidigital number, since it uses as much as digits as its factorization.

23111047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345008.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 23111047 is about 4807.3950326554. The cubic root of 23111047 is about 284.8436487236.

Adding to 23111047 its reverse (74011132), we get a palindrome (97122179).

The spelling of 23111047 in words is "twenty-three million, one hundred eleven thousand, forty-seven".