201423243 has 8 divisors (see below), whose sum is σ = 306930688. Its totient is φ = 115098984.

The previous prime is 201423197. The next prime is 201423251. The reversal of 201423243 is 342324102.

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

It is not a de Polignac number, because 201423243 - 2¹² = 201419147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 9591583 = 201423243 / (2 + 0 + 1 + 4 + 2 + 3 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201423253) 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, 4795771 + ... + 4795812.

It is an arithmetic number, because the mean of its divisors is an integer number (38366336).

Almost surely, 2^201423243 is an apocalyptic number.

201423243 is a deficient number, since it is larger than the sum of its proper divisors (105507445).

201423243 is an equidigital number, since it uses as much as digits as its factorization.

201423243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591593.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 201423243 is about 14192.3656590436. The cubic root of 201423243 is about 586.1874659879.

Adding to 201423243 its reverse (342324102), we get a palindrome (543747345).

The spelling of 201423243 in words is "two hundred one million, four hundred twenty-three thousand, two hundred forty-three".