23533149 has 4 divisors (see below), whose sum is σ = 31377536. Its totient is φ = 15688764.

The previous prime is 23533127. The next prime is 23533171. The reversal of 23533149 is 94133532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23533127) and next prime (23533171).

It is not a de Polignac number, because 23533149 - 2¹⁵ = 23500381 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 (23533189) 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, 3922189 + ... + 3922194.

It is an arithmetic number, because the mean of its divisors is an integer number (7844384).

Almost surely, 2^23533149 is an apocalyptic number.

It is an amenable number.

23533149 is a deficient number, since it is larger than the sum of its proper divisors (7844387).

23533149 is an equidigital number, since it uses as much as digits as its factorization.

23533149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7844386.

The product of its digits is 9720, while the sum is 30.

The square root of 23533149 is about 4851.0977108279. The cubic root of 23533149 is about 286.5673327789.

The spelling of 23533149 in words is "twenty-three million, five hundred thirty-three thousand, one hundred forty-nine".