23331421 has 4 divisors (see below), whose sum is σ = 23370844. Its totient is φ = 23292000.

The previous prime is 23331401. The next prime is 23331431. The reversal of 23331421 is 12413332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17131321 + 6200100 = 4139^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 23331421 - 2¹³ = 23323229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23331401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18810 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (5842711).

Almost surely, 2^23331421 is an apocalyptic number.

It is an amenable number.

23331421 is a deficient number, since it is larger than the sum of its proper divisors (39423).

23331421 is an equidigital number, since it uses as much as digits as its factorization.

23331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39422.

The product of its digits is 432, while the sum is 19.

The square root of 23331421 is about 4830.2609660349. The cubic root of 23331421 is about 285.7461560044.

Adding to 23331421 its reverse (12413332), we get a palindrome (35744753).

The spelling of 23331421 in words is "twenty-three million, three hundred thirty-one thousand, four hundred twenty-one".