23150221 has 4 divisors (see below), whose sum is σ = 23167872. Its totient is φ = 23132572.

The previous prime is 23150201. The next prime is 23150233. The reversal of 23150221 is 12205132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23150221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23150195 and 23150204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23150201) 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 3 ways as a sum of consecutive naturals, for example, 6685 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (5791968).

Almost surely, 2^23150221 is an apocalyptic number.

It is an amenable number.

23150221 is a deficient number, since it is larger than the sum of its proper divisors (17651).

23150221 is a wasteful number, since it uses less digits than its factorization.

23150221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17650.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23150221 is about 4811.4676555080. The cubic root of 23150221 is about 285.0044977232.

Adding to 23150221 its reverse (12205132), we get a palindrome (35355353).

The spelling of 23150221 in words is "twenty-three million, one hundred fifty thousand, two hundred twenty-one".