201031331340 has 96 divisors (see below), whose sum is σ = 643541197824.
Its totient is φ = 45932808960.
The previous prime is 201031331273. The next prime is 201031331357. The reversal of 201031331340 is 43133130102.
It is a Harshad number since it is a multiple of its sum of digits (21).
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, 1050342 + ... + 1226898.
It is an arithmetic number, because the mean of its divisors is an integer number (6703554144).
Almost surely, 2201031331340 is an apocalyptic number.
201031331340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
201031331340 is an abundant number, since it is smaller than the sum of its proper divisors (442509866484).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
201031331340 is a wasteful number, since it uses less digits than its factorization.
201031331340 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 179287 (or 179285 counting only the distinct ones).
The product of its (nonzero) digits is 648, while the sum is 21.
Adding to 201031331340 its reverse (43133130102), we get a palindrome (244164461442).
The spelling of 201031331340 in words is "two hundred one billion, thirty-one million, three hundred thirty-one thousand, three hundred forty".