201532215550 has 24 divisors (see below), whose sum is σ = 378353201256. Its totient is φ = 79859492640.

The previous prime is 201532215527. The next prime is 201532215557. The reversal of 201532215550 is 55512235102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201532215557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18829437 + ... + 18840136.

It is an arithmetic number, because the mean of its divisors is an integer number (15764716719).

Almost surely, 2^201532215550 is an apocalyptic number.

201532215550 is a deficient number, since it is larger than the sum of its proper divisors (176820985706).

201532215550 is a wasteful number, since it uses less digits than its factorization.

201532215550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37669692 (or 37669687 counting only the distinct ones).

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

The spelling of 201532215550 in words is "two hundred one billion, five hundred thirty-two million, two hundred fifteen thousand, five hundred fifty".