281131047 has 32 divisors (see below), whose sum is σ = 442022400. Its totient is φ = 176210496.

The previous prime is 281131031. The next prime is 281131061. The reversal of 281131047 is 740131182.

It is not a de Polignac number, because 281131047 - 2⁴ = 281131031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 281131047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281131007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32803 + ... + 40475.

It is an arithmetic number, because the mean of its divisors is an integer number (13813200).

Almost surely, 2^281131047 is an apocalyptic number.

281131047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

281131047 is a deficient number, since it is larger than the sum of its proper divisors (160891353).

281131047 is a wasteful number, since it uses less digits than its factorization.

281131047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7764 (or 7758 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 281131047 is about 16766.9629629221. The cubic root of 281131047 is about 655.0929666229.

It can be divided in two parts, 281 and 131047, that added together give a triangular number (131328 = T₅₁₂).

The spelling of 281131047 in words is "two hundred eighty-one million, one hundred thirty-one thousand, forty-seven".