23221256 has 8 divisors (see below), whose sum is σ = 43539870. Its totient is φ = 11610624.

The previous prime is 23221241. The next prime is 23221259. The reversal of 23221256 is 65212232.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 3276100 = 4466^2 + 1810^2 .

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

It is not an unprimeable number, because it can be changed into a prime (23221259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1451321 + ... + 1451336.

Almost surely, 2^23221256 is an apocalyptic number.

It is an amenable number.

23221256 is a deficient number, since it is larger than the sum of its proper divisors (20318614).

23221256 is a wasteful number, since it uses less digits than its factorization.

23221256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902663 (or 2902659 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 23221256 is about 4818.8438447412. The cubic root of 23221256 is about 285.2957062115.

Adding to 23221256 its reverse (65212232), we get a palindrome (88433488).

The spelling of 23221256 in words is "twenty-three million, two hundred twenty-one thousand, two hundred fifty-six".