281427813 has 24 divisors (see below), whose sum is σ = 419065920. Its totient is φ = 181880640.

The previous prime is 281427799. The next prime is 281427823. The reversal of 281427813 is 318724182.

It is not a de Polignac number, because 281427813 - 2¹² = 281423717 is a prime.

It is a super-2 number, since 2×281427813² = 158403227859925938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281427823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57808 + ... + 62486.

It is an arithmetic number, because the mean of its divisors is an integer number (17461080).

Almost surely, 2^281427813 is an apocalyptic number.

It is an amenable number.

281427813 is a deficient number, since it is larger than the sum of its proper divisors (137638107).

281427813 is a wasteful number, since it uses less digits than its factorization.

281427813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4889 (or 4886 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 281427813 is about 16775.8103530053. The cubic root of 281427813 is about 655.3233940983.

The spelling of 281427813 in words is "two hundred eighty-one million, four hundred twenty-seven thousand, eight hundred thirteen".