23143911 has 16 divisors (see below), whose sum is σ = 36801024. Its totient is φ = 12649824.

The previous prime is 23143903. The next prime is 23143931. The reversal of 23143911 is 11934132.

It is not a de Polignac number, because 23143911 - 2³ = 23143903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23143931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23476 + ... + 24441.

It is an arithmetic number, because the mean of its divisors is an integer number (2300064).

Almost surely, 2^23143911 is an apocalyptic number.

23143911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23143911 is a deficient number, since it is larger than the sum of its proper divisors (13657113).

23143911 is a wasteful number, since it uses less digits than its factorization.

23143911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47950.

The product of its digits is 648, while the sum is 24.

The square root of 23143911 is about 4810.8118857424. The cubic root of 23143911 is about 284.9786010403.

The spelling of 23143911 in words is "twenty-three million, one hundred forty-three thousand, nine hundred eleven".