201550320 has 120 divisors (see below), whose sum is σ = 681566496. Its totient is φ = 53374464.

The previous prime is 201550289. The next prime is 201550333. The reversal of 201550320 is 23055102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201550293 and 201550302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112149 + ... + 113931.

Almost surely, 2^201550320 is an apocalyptic number.

201550320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201550320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340783248).

201550320 is an abundant number, since it is smaller than the sum of its proper divisors (480016176).

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

201550320 is a wasteful number, since it uses less digits than its factorization.

201550320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 201550320 is about 14196.8419023387. The cubic root of 201550320 is about 586.3107144003.

The spelling of 201550320 in words is "two hundred one million, five hundred fifty thousand, three hundred twenty".