201253055550 has 96 divisors (see below), whose sum is σ = 537608448000. Its totient is φ = 49678147200.

The previous prime is 201253055533. The next prime is 201253055557. The reversal of 201253055550 is 55550352102.

It is a super-2 number, since 2×201253055550² (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 (201253055557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 833925 + ... + 1047824.

It is an arithmetic number, because the mean of its divisors is an integer number (5600088000).

Almost surely, 2^201253055550 is an apocalyptic number.

201253055550 is an abundant number, since it is smaller than the sum of its proper divisors (336355392450).

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

201253055550 is a wasteful number, since it uses less digits than its factorization.

201253055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881818 (or 1881813 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 201253055550 in words is "two hundred one billion, two hundred fifty-three million, fifty-five thousand, five hundred fifty".