281165093 has 4 divisors (see below), whose sum is σ = 306725568. Its totient is φ = 255604620.

The previous prime is 281165051. The next prime is 281165099. The reversal of 281165093 is 390561182.

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 281165093 - 2¹⁸ = 280902949 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 (281165099) 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, 12780221 + ... + 12780242.

It is an arithmetic number, because the mean of its divisors is an integer number (76681392).

Almost surely, 2^281165093 is an apocalyptic number.

It is an amenable number.

281165093 is a deficient number, since it is larger than the sum of its proper divisors (25560475).

281165093 is a wasteful number, since it uses less digits than its factorization.

281165093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25560474.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 281165093 is about 16767.9782025145. The cubic root of 281165093 is about 655.1194102750.

The spelling of 281165093 in words is "two hundred eighty-one million, one hundred sixty-five thousand, ninety-three".