201311234340 has 24 divisors (see below), whose sum is σ = 563671456320. Its totient is φ = 53682995808.

The previous prime is 201311234339. The next prime is 201311234347. The reversal of 201311234340 is 43432113102.

It is a happy number.

It is a super-3 number, since 3×201311234340³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201311234340.

It is not an unprimeable number, because it can be changed into a prime (201311234347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677593560 + ... + 1677593679.

It is an arithmetic number, because the mean of its divisors is an integer number (23486310680).

Almost surely, 2^201311234340 is an apocalyptic number.

201311234340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201311234340 is an abundant number, since it is smaller than the sum of its proper divisors (362360221980).

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

201311234340 is a wasteful number, since it uses less digits than its factorization.

201311234340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355187251 (or 3355187249 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 201311234340 its reverse (43432113102), we get a palindrome (244743347442).

The spelling of 201311234340 in words is "two hundred one billion, three hundred eleven million, two hundred thirty-four thousand, three hundred forty".