281152109 has 4 divisors (see below), whose sum is σ = 321316704. Its totient is φ = 240987516.

The previous prime is 281152097. The next prime is 281152117. The reversal of 281152109 is 901251182.

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 not a de Polignac number, because 281152109 - 2⁸ = 281151853 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 (281152909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20082287 + ... + 20082300.

It is an arithmetic number, because the mean of its divisors is an integer number (80329176).

Almost surely, 2^281152109 is an apocalyptic number.

It is an amenable number.

281152109 is a deficient number, since it is larger than the sum of its proper divisors (40164595).

281152109 is an equidigital number, since it uses as much as digits as its factorization.

281152109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40164594.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 281152109 is about 16767.5910315108. The cubic root of 281152109 is about 655.1093258068.

The spelling of 281152109 in words is "two hundred eighty-one million, one hundred fifty-two thousand, one hundred nine".