201385055 has 4 divisors (see below), whose sum is σ = 241662072. Its totient is φ = 161108040.

The previous prime is 201385003. The next prime is 201385057. The reversal of 201385055 is 550583102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 201385055 - 2¹⁰ = 201384031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201385057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20138501 + ... + 20138510.

It is an arithmetic number, because the mean of its divisors is an integer number (60415518).

Almost surely, 2^201385055 is an apocalyptic number.

201385055 is a deficient number, since it is larger than the sum of its proper divisors (40277017).

201385055 is an equidigital number, since it uses as much as digits as its factorization.

201385055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40277016.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 201385055 is about 14191.0202240713. The cubic root of 201385055 is about 586.1504183903.

The spelling of 201385055 in words is "two hundred one million, three hundred eighty-five thousand, fifty-five".