23355421 has 4 divisors (see below), whose sum is σ = 23369344. Its totient is φ = 23341500.

The previous prime is 23355413. The next prime is 23355439. The reversal of 23355421 is 12455332.

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 not a de Polignac number, because 23355421 - 2³ = 23355413 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 (23355491) 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, 4035 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (5842336).

Almost surely, 2^23355421 is an apocalyptic number.

It is an amenable number.

23355421 is a deficient number, since it is larger than the sum of its proper divisors (13923).

23355421 is a wasteful number, since it uses less digits than its factorization.

23355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13922.

The product of its digits is 3600, while the sum is 25.

The square root of 23355421 is about 4832.7446653015. The cubic root of 23355421 is about 285.8441005690.

The spelling of 23355421 in words is "twenty-three million, three hundred fifty-five thousand, four hundred twenty-one".