201515530450 has 48 divisors (see below), whose sum is σ = 424895929920. Its totient is φ = 70489638720.

The previous prime is 201515530379. The next prime is 201515530459. The reversal of 201515530450 is 54035515102.

201515530450 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-3 number, since 3×201515530450³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (201515530459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8146174 + ... + 8170873.

It is an arithmetic number, because the mean of its divisors is an integer number (8851998540).

Almost surely, 2^201515530450 is an apocalyptic number.

201515530450 is an abundant number, since it is smaller than the sum of its proper divisors (223380399470).

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

201515530450 is a wasteful number, since it uses less digits than its factorization.

201515530450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317091 (or 16317086 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 201515530450 in words is "two hundred one billion, five hundred fifteen million, five hundred thirty thousand, four hundred fifty".