201311305442 has 64 divisors (see below), whose sum is σ = 343402972416. Its totient is φ = 87811257600.

The previous prime is 201311305421. The next prime is 201311305457. The reversal of 201311305442 is 244503113102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31584968 + ... + 31591340.

It is an arithmetic number, because the mean of its divisors is an integer number (5365671444).

Almost surely, 2^201311305442 is an apocalyptic number.

201311305442 is a deficient number, since it is larger than the sum of its proper divisors (142091666974).

201311305442 is a wasteful number, since it uses less digits than its factorization.

201311305442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 201311305442 its reverse (244503113102), we get a palindrome (445814418544).

The spelling of 201311305442 in words is "two hundred one billion, three hundred eleven million, three hundred five thousand, four hundred forty-two".