281215255 has 4 divisors (see below), whose sum is σ = 337458312. Its totient is φ = 224972200.

The previous prime is 281215243. The next prime is 281215271. The reversal of 281215255 is 552512182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552512182 = 2 ⋅276256091.

It is not a de Polignac number, because 281215255 - 2⁵ = 281215223 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 28121521 + ... + 28121530.

It is an arithmetic number, because the mean of its divisors is an integer number (84364578).

Almost surely, 2^281215255 is an apocalyptic number.

281215255 is a deficient number, since it is larger than the sum of its proper divisors (56243057).

281215255 is an equidigital number, since it uses as much as digits as its factorization.

281215255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56243056.

The product of its digits is 8000, while the sum is 31.

The square root of 281215255 is about 16769.4739034950. The cubic root of 281215255 is about 655.1583673938.

The spelling of 281215255 in words is "two hundred eighty-one million, two hundred fifteen thousand, two hundred fifty-five".