201072221550 has 36 divisors (see below), whose sum is σ = 540214036440. Its totient is φ = 53619258960.

The previous prime is 201072221527. The next prime is 201072221551. The reversal of 201072221550 is 55122270102.

201072221550 is a `hidden beast` number, since 2 + 0 + 107 + 2 + 2 + 2 + 1 + 550 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201072221551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 223413130 + ... + 223414029.

Almost surely, 2^201072221550 is an apocalyptic number.

201072221550 is an abundant number, since it is smaller than the sum of its proper divisors (339141814890).

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

201072221550 is a wasteful number, since it uses less digits than its factorization.

201072221550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446827177 (or 446827169 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

Adding to 201072221550 its reverse (55122270102), we get a palindrome (256194491652).

The spelling of 201072221550 in words is "two hundred one billion, seventy-two million, two hundred twenty-one thousand, five hundred fifty".