23100421 has 4 divisors (see below), whose sum is σ = 23536332. Its totient is φ = 22664512.

The previous prime is 23100419. The next prime is 23100439. The reversal of 23100421 is 12400132.

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 6200100 + 16900321 = 2490^2 + 4111^2 .

It is a cyclic number.

It is not a de Polignac number, because 23100421 - 2¹ = 23100419 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 (23100481) 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, 217876 + ... + 217981.

It is an arithmetic number, because the mean of its divisors is an integer number (5884083).

Almost surely, 2^23100421 is an apocalyptic number.

It is an amenable number.

23100421 is a deficient number, since it is larger than the sum of its proper divisors (435911).

23100421 is an equidigital number, since it uses as much as digits as its factorization.

23100421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435910.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23100421 is about 4806.2897332558. The cubic root of 23100421 is about 284.7999868822.

Adding to 23100421 its reverse (12400132), we get a palindrome (35500553).

The spelling of 23100421 in words is "twenty-three million, one hundred thousand, four hundred twenty-one".