201854 has 4 divisors (see below), whose sum is σ = 302784. Its totient is φ = 100926.

The previous prime is 201847. The next prime is 201881. The reversal of 201854 is 458102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50462 + ... + 50465.

It is an arithmetic number, because the mean of its divisors is an integer number (75696).

2²⁰¹⁸⁵⁴ is an apocalyptic number.

201854 is a deficient number, since it is larger than the sum of its proper divisors (100930).

201854 is a wasteful number, since it uses less digits than its factorization.

201854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100929.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 201854 is about 449.2816488574. The cubic root of 201854 is about 58.6605035422.

Adding to 201854 its reverse (458102), we get a palindrome (659956).

The spelling of 201854 in words is "two hundred one thousand, eight hundred fifty-four".