23132221 has 8 divisors (see below), whose sum is σ = 26936064. Its totient is φ = 19453200.

The previous prime is 23132209. The next prime is 23132233. The reversal of 23132221 is 12223132.

23132221 = T₁₅₁ + T₁₅₂ + ... + T₅₂₁.

It is an interprime number because it is at equal distance from previous prime (23132209) and next prime (23132233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23132221 - 2⁹ = 23131709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23132195 and 23132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23132251) 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 7 ways as a sum of consecutive naturals, for example, 30805 + ... + 31546.

It is an arithmetic number, because the mean of its divisors is an integer number (3367008).

Almost surely, 2^23132221 is an apocalyptic number.

It is an amenable number.

23132221 is a deficient number, since it is larger than the sum of its proper divisors (3803843).

23132221 is an equidigital number, since it uses as much as digits as its factorization.

23132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62411.

The product of its digits is 144, while the sum is 16.

The square root of 23132221 is about 4809.5967606443. The cubic root of 23132221 is about 284.9306120192.

Adding to 23132221 its reverse (12223132), we get a palindrome (35355353).

The spelling of 23132221 in words is "twenty-three million, one hundred thirty-two thousand, two hundred twenty-one".