201240520404 has 72 divisors (see below), whose sum is σ = 595881040608. Its totient is φ = 52270263360.

The previous prime is 201240520379. The next prime is 201240520423. The reversal of 201240520404 is 404025042102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15550159 + ... + 15563094.

It is an arithmetic number, because the mean of its divisors is an integer number (8276125564).

Almost surely, 2^201240520404 is an apocalyptic number.

It is an amenable number.

201240520404 is an abundant number, since it is smaller than the sum of its proper divisors (394640520204).

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

201240520404 is a wasteful number, since it uses less digits than its factorization.

201240520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31113285 (or 31113276 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 201240520404 its reverse (404025042102), we get a palindrome (605265562506).

The spelling of 201240520404 in words is "two hundred one billion, two hundred forty million, five hundred twenty thousand, four hundred four".