201255550 has 12 divisors (see below), whose sum is σ = 374335416. Its totient is φ = 80502200.

The previous prime is 201255539. The next prime is 201255553. The reversal of 201255550 is 55552102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201255553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2012506 + ... + 2012605.

It is an arithmetic number, because the mean of its divisors is an integer number (31194618).

Almost surely, 2^201255550 is an apocalyptic number.

201255550 is a deficient number, since it is larger than the sum of its proper divisors (173079866).

201255550 is a wasteful number, since it uses less digits than its factorization.

201255550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025123 (or 4025118 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 201255550 is about 14186.4565695596. The cubic root of 201255550 is about 586.0247458944.

The spelling of 201255550 in words is "two hundred one million, two hundred fifty-five thousand, five hundred fifty".