23461221 has 16 divisors (see below), whose sum is σ = 35900928. Its totient is φ = 13350000.

The previous prime is 23461159. The next prime is 23461223. The reversal of 23461221 is 12216432.

23461221 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 23461221 - 2¹³ = 23453029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23461223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3046 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (2243808).

Almost surely, 2^23461221 is an apocalyptic number.

23461221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23461221 is a deficient number, since it is larger than the sum of its proper divisors (12439707).

23461221 is a wasteful number, since it uses less digits than its factorization.

23461221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712.

The product of its digits is 576, while the sum is 21.

The square root of 23461221 is about 4843.6784575362. The cubic root of 23461221 is about 286.2750748106.

Adding to 23461221 its reverse (12216432), we get a palindrome (35677653).

The spelling of 23461221 in words is "twenty-three million, four hundred sixty-one thousand, two hundred twenty-one".