201515411988 has 216 divisors, whose sum is σ = 595546608384. Its totient is φ = 57210785280.

The previous prime is 201515411987. The next prime is 201515412011. The reversal of 201515411988 is 889114515102.

201515411988 is a `hidden beast` number, since 2 + 0 + 1 + 515 + 41 + 1 + 98 + 8 = 666.

201515411988 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201515411988² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201515411987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16507495 + ... + 16519697.

It is an arithmetic number, because the mean of its divisors is an integer number (2757160224).

Almost surely, 2^201515411988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201515411988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297773304192).

201515411988 is an abundant number, since it is smaller than the sum of its proper divisors (394031196396).

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

201515411988 is a wasteful number, since it uses less digits than its factorization.

201515411988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12475 (or 12459 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The spelling of 201515411988 in words is "two hundred one billion, five hundred fifteen million, four hundred eleven thousand, nine hundred eighty-eight".