201855794281 has 8 divisors (see below), whose sum is σ = 203485245440. Its totient is φ = 200226968928.

The previous prime is 201855794227. The next prime is 201855794297. The reversal of 201855794281 is 182497558102.

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 201855794281 - 2¹³ = 201855786089 is a prime.

It is a super-2 number, since 2×201855794281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201855794201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502405 + ... + 810013.

It is an arithmetic number, because the mean of its divisors is an integer number (25435655680).

Almost surely, 2^201855794281 is an apocalyptic number.

It is an amenable number.

201855794281 is a deficient number, since it is larger than the sum of its proper divisors (1629451159).

201855794281 is a wasteful number, since it uses less digits than its factorization.

201855794281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312903.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 201855794281 in words is "two hundred one billion, eight hundred fifty-five million, seven hundred ninety-four thousand, two hundred eighty-one".