201423443 has 16 divisors (see below), whose sum is σ = 227598336. Its totient is φ = 176864160.

The previous prime is 201423433. The next prime is 201423491. The reversal of 201423443 is 344324102.

It is a cyclic number.

It is not a de Polignac number, because 201423443 - 2¹⁸ = 201161299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201423433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55346 + ... + 58872.

It is an arithmetic number, because the mean of its divisors is an integer number (14224896).

Almost surely, 2^201423443 is an apocalyptic number.

201423443 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

201423443 is a deficient number, since it is larger than the sum of its proper divisors (26174893).

201423443 is a wasteful number, since it uses less digits than its factorization.

201423443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 201423443 is about 14192.3727050835. The cubic root of 201423443 is about 586.1876600030.

Adding to 201423443 its reverse (344324102), we get a palindrome (545747545).

The spelling of 201423443 in words is "two hundred one million, four hundred twenty-three thousand, four hundred forty-three".