23221047 has 16 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 14884800.

The previous prime is 23221019. The next prime is 23221063. The reversal of 23221047 is 74012232.

It is not a de Polignac number, because 23221047 - 2⁷ = 23220919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221067) by changing a digit.

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, 7404 + ... + 10062.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^23221047 is an apocalyptic number.

23221047 is a deficient number, since it is larger than the sum of its proper divisors (8954313).

23221047 is a wasteful number, since it uses less digits than its factorization.

23221047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 23221047 is about 4818.8221589928. The cubic root of 23221047 is about 285.2948502862.

Adding to 23221047 its reverse (74012232), we get a palindrome (97233279).

The spelling of 23221047 in words is "twenty-three million, two hundred twenty-one thousand, forty-seven".