23215144 has 8 divisors (see below), whose sum is σ = 43528410. Its totient is φ = 11607568.

The previous prime is 23215139. The next prime is 23215151. The reversal of 23215144 is 44151232.

It can be written as a sum of positive squares in only one way, i.e., 21622500 + 1592644 = 4650^2 + 1262^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450939 + ... + 1450954.

Almost surely, 2^23215144 is an apocalyptic number.

It is an amenable number.

23215144 is a deficient number, since it is larger than the sum of its proper divisors (20313266).

23215144 is a wasteful number, since it uses less digits than its factorization.

23215144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901899 (or 2901895 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 23215144 is about 4818.2096259918. The cubic root of 23215144 is about 285.2706733944.

Adding to 23215144 its reverse (44151232), we get a palindrome (67366376).

It can be divided in two parts, 232 and 15144, that added together give a square (15376 = 124²).

The spelling of 23215144 in words is "twenty-three million, two hundred fifteen thousand, one hundred forty-four".