281530131 has 8 divisors (see below), whose sum is σ = 375864720. Its totient is φ = 187441152.

The previous prime is 281530129. The next prime is 281530133. The reversal of 281530131 is 131035182.

It is an interprime number because it is at equal distance from previous prime (281530129) and next prime (281530133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 281530131 - 2¹ = 281530129 is a prime.

It is a super-2 number, since 2×281530131² = 158518429321754322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (281530133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58710 + ... + 63323.

It is an arithmetic number, because the mean of its divisors is an integer number (46983090).

Almost surely, 2^281530131 is an apocalyptic number.

281530131 is a deficient number, since it is larger than the sum of its proper divisors (94334589).

281530131 is a wasteful number, since it uses less digits than its factorization.

281530131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122805.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 281530131 is about 16778.8596453990. The cubic root of 281530131 is about 655.4028025667.

The spelling of 281530131 in words is "two hundred eighty-one million, five hundred thirty thousand, one hundred thirty-one".