201423311440 has 160 divisors (see below), whose sum is σ = 527073765120. Its totient is φ = 71028215808.

The previous prime is 201423311399. The next prime is 201423311443. The reversal of 201423311440 is 44113324102.

201423311440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201423311443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16331196 + ... + 16343524.

It is an arithmetic number, because the mean of its divisors is an integer number (3294211032).

Almost surely, 2^201423311440 is an apocalyptic number.

201423311440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201423311440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263536882560).

201423311440 is an abundant number, since it is smaller than the sum of its proper divisors (325650453680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201423311440 is a wasteful number, since it uses less digits than its factorization.

201423311440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13061 (or 13055 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 201423311440 its reverse (44113324102), we get a palindrome (245536635542).

The spelling of 201423311440 in words is "two hundred one billion, four hundred twenty-three million, three hundred eleven thousand, four hundred forty".