23221971 has 40 divisors (see below), whose sum is σ = 37171200. Its totient is φ = 14405040.

The previous prime is 23221951. The next prime is 23221981. The reversal of 23221971 is 17912232.

It is not a de Polignac number, because 23221971 - 2⁷ = 23221843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23221931) 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 39 ways as a sum of consecutive naturals, for example, 121486 + ... + 121676.

It is an arithmetic number, because the mean of its divisors is an integer number (929280).

Almost surely, 2^23221971 is an apocalyptic number.

23221971 is a deficient number, since it is larger than the sum of its proper divisors (13949229).

23221971 is a wasteful number, since it uses less digits than its factorization.

23221971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 292 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 23221971 is about 4818.9180320898. The cubic root of 23221971 is about 285.2986343382.

The spelling of 23221971 in words is "twenty-three million, two hundred twenty-one thousand, nine hundred seventy-one".