201043423423 has 4 divisors (see below), whose sum is σ = 203875021008. Its totient is φ = 198211825840.

The previous prime is 201043423387. The next prime is 201043423543. The reversal of 201043423423 is 324324340102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201043423423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201043423391 and 201043423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201043123423) 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, 1415798686 + ... + 1415798827.

It is an arithmetic number, because the mean of its divisors is an integer number (50968755252).

Almost surely, 2^201043423423 is an apocalyptic number.

201043423423 is a deficient number, since it is larger than the sum of its proper divisors (2831597585).

201043423423 is an equidigital number, since it uses as much as digits as its factorization.

201043423423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831597584.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 201043423423 its reverse (324324340102), we get a palindrome (525367763525).

The spelling of 201043423423 in words is "two hundred one billion, forty-three million, four hundred twenty-three thousand, four hundred twenty-three".