281015131 has 2 divisors, whose sum is σ = 281015132. Its totient is φ = 281015130.

The previous prime is 281015123. The next prime is 281015177. The reversal of 281015131 is 131510182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281015131 - 2³ = 281015123 is a prime.

It is a super-2 number, since 2×281015131² = 157939007701894322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (281015101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140507565 + 140507566.

It is an arithmetic number, because the mean of its divisors is an integer number (140507566).

Almost surely, 2^281015131 is an apocalyptic number.

281015131 is a deficient number, since it is larger than the sum of its proper divisors (1).

281015131 is an equidigital number, since it uses as much as digits as its factorization.

281015131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 281015131 is about 16763.5059280569. The cubic root of 281015131 is about 655.0029182319.

It can be divided in two parts, 2810151 and 31, that added together give a palindrome (2810182).

The spelling of 281015131 in words is "two hundred eighty-one million, fifteen thousand, one hundred thirty-one".