201555320 has 16 divisors (see below), whose sum is σ = 453499560. Its totient is φ = 80622112.

The previous prime is 201555311. The next prime is 201555337. The reversal of 201555320 is 23555102.

201555320 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519402 + ... + 2519481.

Almost surely, 2^201555320 is an apocalyptic number.

201555320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201555320 is an abundant number, since it is smaller than the sum of its proper divisors (251944240).

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

201555320 is a wasteful number, since it uses less digits than its factorization.

201555320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038894 (or 5038890 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 201555320 is about 14197.0179967485. The cubic root of 201555320 is about 586.3155627005.

The spelling of 201555320 in words is "two hundred one million, five hundred fifty-five thousand, three hundred twenty".