201240515540 has 12 divisors (see below), whose sum is σ = 422605082676. Its totient is φ = 80496206208.

The previous prime is 201240515533. The next prime is 201240515551. The reversal of 201240515540 is 45515042102.

201240515540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148969753156 + 52270762384 = 385966^2 + 228628^2 .

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 3 ways as a sum of consecutive naturals, for example, 5031012869 + ... + 5031012908.

It is an arithmetic number, because the mean of its divisors is an integer number (35217090223).

Almost surely, 2^201240515540 is an apocalyptic number.

201240515540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201240515540 is an abundant number, since it is smaller than the sum of its proper divisors (221364567136).

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

201240515540 is a wasteful number, since it uses less digits than its factorization.

201240515540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062025786 (or 10062025784 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 201240515540 its reverse (45515042102), we get a palindrome (246755557642).

The spelling of 201240515540 in words is "two hundred one billion, two hundred forty million, five hundred fifteen thousand, five hundred forty".