281505130 has 8 divisors (see below), whose sum is σ = 506709252. Its totient is φ = 112602048.

The previous prime is 281505113. The next prime is 281505143. The reversal of 281505130 is 31505182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 272547081 + 8958049 = 16509^2 + 2993^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 281505095 and 281505104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14075247 + ... + 14075266.

Almost surely, 2^281505130 is an apocalyptic number.

281505130 is a deficient number, since it is larger than the sum of its proper divisors (225204122).

281505130 is a wasteful number, since it uses less digits than its factorization.

281505130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28150520.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 281505130 is about 16778.1146139845. The cubic root of 281505130 is about 655.3834011969.

The spelling of 281505130 in words is "two hundred eighty-one million, five hundred five thousand, one hundred thirty".