201485551 has 4 divisors (see below), whose sum is σ = 201513952. Its totient is φ = 201457152.

The previous prime is 201485527. The next prime is 201485561. The reversal of 201485551 is 155584102.

201485551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201485551 - 2¹⁷ = 201354479 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 (201485561) 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, 6511 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (50378488).

Almost surely, 2^201485551 is an apocalyptic number.

201485551 is a deficient number, since it is larger than the sum of its proper divisors (28401).

201485551 is a wasteful number, since it uses less digits than its factorization.

201485551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28400.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 201485551 is about 14194.5606131363. The cubic root of 201485551 is about 586.2479032420.

The spelling of 201485551 in words is "two hundred one million, four hundred eighty-five thousand, five hundred fifty-one".