23111149 has 2 divisors, whose sum is σ = 23111150. Its totient is φ = 23111148.

The previous prime is 23111119. The next prime is 23111183. The reversal of 23111149 is 94111132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 2924100 = 4493^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111149 - 2²¹ = 21013997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23111119) 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 as a sum of consecutive naturals, namely, 11555574 + 11555575.

It is an arithmetic number, because the mean of its divisors is an integer number (11555575).

Almost surely, 2^23111149 is an apocalyptic number.

It is an amenable number.

23111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111149 is an equidigital number, since it uses as much as digits as its factorization.

23111149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 23111149 is about 4807.4056412997. The cubic root of 23111149 is about 284.8440677730.

The spelling of 23111149 in words is "twenty-three million, one hundred eleven thousand, one hundred forty-nine".