201423543406 has 16 divisors (see below), whose sum is σ = 306295136928. Its totient is φ = 99325353600.

The previous prime is 201423543341. The next prime is 201423543407. The reversal of 201423543406 is 604345324102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201423543407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2595751 + ... + 2672221.

It is an arithmetic number, because the mean of its divisors is an integer number (19143446058).

Almost surely, 2^201423543406 is an apocalyptic number.

201423543406 is a deficient number, since it is larger than the sum of its proper divisors (104871593522).

201423543406 is a wasteful number, since it uses less digits than its factorization.

201423543406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94587.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 201423543406 its reverse (604345324102), we get a palindrome (805768867508).

The spelling of 201423543406 in words is "two hundred one billion, four hundred twenty-three million, five hundred forty-three thousand, four hundred six".