201243315042 has 192 divisors, whose sum is σ = 557110794240. Its totient is φ = 50977382400.

The previous prime is 201243315029. The next prime is 201243315127. The reversal of 201243315042 is 240513342102.

201243315042 is a `hidden beast` number, since 2 + 0 + 124 + 3 + 31 + 504 + 2 = 666.

201243315042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 201243314997 and 201243315015.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 45828667 + ... + 45833057.

It is an arithmetic number, because the mean of its divisors is an integer number (2901618720).

Almost surely, 2^201243315042 is an apocalyptic number.

201243315042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 201243315042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278555397120).

201243315042 is an abundant number, since it is smaller than the sum of its proper divisors (355867479198).

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

201243315042 is a wasteful number, since it uses less digits than its factorization.

201243315042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5229 (or 5226 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 201243315042 its reverse (240513342102), we get a palindrome (441756657144).

The spelling of 201243315042 in words is "two hundred one billion, two hundred forty-three million, three hundred fifteen thousand, forty-two".