281004131 has 2 divisors, whose sum is σ = 281004132. Its totient is φ = 281004130.

The previous prime is 281004127. The next prime is 281004151. The reversal of 281004131 is 131400182.

It is an a-pointer prime, because the next prime (281004151) can be obtained adding 281004131 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281004131 - 2² = 281004127 is a prime.

It is a super-2 number, since 2×281004131² = 157926643278130322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (281004121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140502065 + 140502066.

It is an arithmetic number, because the mean of its divisors is an integer number (140502066).

Almost surely, 2^281004131 is an apocalyptic number.

281004131 is a deficient number, since it is larger than the sum of its proper divisors (1).

281004131 is an equidigital number, since it uses as much as digits as its factorization.

281004131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 281004131 is about 16763.1778311870. The cubic root of 281004131 is about 654.9943716860.

The spelling of 281004131 in words is "two hundred eighty-one million, four thousand, one hundred thirty-one".