23125221 has 24 divisors (see below), whose sum is σ = 38301120. Its totient is φ = 13170816.

The previous prime is 23125199. The next prime is 23125229. The reversal of 23125221 is 12252132.

It is not a de Polignac number, because 23125221 - 2¹¹ = 23123173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23125194 and 23125203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23125229) 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 23 ways as a sum of consecutive naturals, for example, 37050 + ... + 37668.

It is an arithmetic number, because the mean of its divisors is an integer number (1595880).

Almost surely, 2^23125221 is an apocalyptic number.

23125221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23125221 is a deficient number, since it is larger than the sum of its proper divisors (15175899).

23125221 is a wasteful number, since it uses less digits than its factorization.

23125221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1222 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 23125221 is about 4808.8689938488. The cubic root of 23125221 is about 284.9018683388.

Adding to 23125221 its reverse (12252132), we get a palindrome (35377353).

It can be divided in two parts, 231 and 25221, that added together give a palindrome (25452).

The spelling of 23125221 in words is "twenty-three million, one hundred twenty-five thousand, two hundred twenty-one".