23271645 has 16 divisors (see below), whose sum is σ = 37300032. Its totient is φ = 12389760.

The previous prime is 23271629. The next prime is 23271671. The reversal of 23271645 is 54617232.

It is not a de Polignac number, because 23271645 - 2⁴ = 23271629 is a prime.

It is a super-2 number, since 2×23271645² = 1083138922012050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 11209 + ... + 13121.

It is an arithmetic number, because the mean of its divisors is an integer number (2331252).

Almost surely, 2^23271645 is an apocalyptic number.

It is an amenable number.

23271645 is a deficient number, since it is larger than the sum of its proper divisors (14028387).

23271645 is a wasteful number, since it uses less digits than its factorization.

23271645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732.

The product of its digits is 10080, while the sum is 30.

The square root of 23271645 is about 4824.0693402977. The cubic root of 23271645 is about 285.5019164128.

Adding to 23271645 its reverse (54617232), we get a palindrome (77888877).

The spelling of 23271645 in words is "twenty-three million, two hundred seventy-one thousand, six hundred forty-five".