23201421 has 8 divisors (see below), whose sum is σ = 32002080. Its totient is φ = 14934192.

The previous prime is 23201419. The next prime is 23201429. The reversal of 23201421 is 12410232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23201421 - 2¹ = 23201419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23201421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133255 + ... + 133428.

It is an arithmetic number, because the mean of its divisors is an integer number (4000260).

Almost surely, 2^23201421 is an apocalyptic number.

It is an amenable number.

23201421 is a deficient number, since it is larger than the sum of its proper divisors (8800659).

23201421 is a wasteful number, since it uses less digits than its factorization.

23201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266715.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 23201421 is about 4816.7853387918. The cubic root of 23201421 is about 285.2144523191.

Adding to 23201421 its reverse (12410232), we get a palindrome (35611653).

It can be divided in two parts, 2320 and 1421, that added together give a triangular number (3741 = T₈₆).

The spelling of 23201421 in words is "twenty-three million, two hundred one thousand, four hundred twenty-one".