201553887 has 8 divisors (see below), whose sum is σ = 284546736. Its totient is φ = 126465152.

The previous prime is 201553879. The next prime is 201553903. The reversal of 201553887 is 788355102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201553887 - 2³ = 201553879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201553087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975968 + ... + 1976069.

It is an arithmetic number, because the mean of its divisors is an integer number (35568342).

Almost surely, 2^201553887 is an apocalyptic number.

201553887 is a deficient number, since it is larger than the sum of its proper divisors (82992849).

201553887 is a wasteful number, since it uses less digits than its factorization.

201553887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952057.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 201553887 is about 14196.9675283139. The cubic root of 201553887 is about 586.3141731858.

It can be divided in two parts, 20155 and 3887, that added together give a palindrome (24042).

The spelling of 201553887 in words is "two hundred one million, five hundred fifty-three thousand, eight hundred eighty-seven".