23213144 has 8 divisors (see below), whose sum is σ = 43524660. Its totient is φ = 11606568.

The previous prime is 23213131. The next prime is 23213147. The reversal of 23213144 is 44131232.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450814 + ... + 1450829.

Almost surely, 2^23213144 is an apocalyptic number.

It is an amenable number.

23213144 is a deficient number, since it is larger than the sum of its proper divisors (20311516).

23213144 is a wasteful number, since it uses less digits than its factorization.

23213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901649 (or 2901645 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 23213144 is about 4818.0020755496. The cubic root of 23213144 is about 285.2624810734.

Subtracting from 23213144 its sum of digits (20), we obtain a square (23213124 = 4818²).

Adding to 23213144 its reverse (44131232), we get a palindrome (67344376).

The spelling of 23213144 in words is "twenty-three million, two hundred thirteen thousand, one hundred forty-four".