281855201 has 4 divisors (see below), whose sum is σ = 282165504. Its totient is φ = 281544900.

The previous prime is 281855149. The next prime is 281855209. The reversal of 281855201 is 102558182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281855201 - 2⁶ = 281855137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281855209) 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, 153785 + ... + 155606.

It is an arithmetic number, because the mean of its divisors is an integer number (70541376).

Almost surely, 2^281855201 is an apocalyptic number.

It is an amenable number.

281855201 is a deficient number, since it is larger than the sum of its proper divisors (310303).

281855201 is an equidigital number, since it uses as much as digits as its factorization.

281855201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310302.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 281855201 is about 16788.5437426836. The cubic root of 281855201 is about 655.6549601131.

The spelling of 281855201 in words is "two hundred eighty-one million, eight hundred fifty-five thousand, two hundred one".