405281155 has 4 divisors (see below), whose sum is σ = 486337392. Its totient is φ = 324224920.

The previous prime is 405281147. The next prime is 405281161. The reversal of 405281155 is 551182504.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 405281155 - 2³ = 405281147 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40528111 + ... + 40528120.

It is an arithmetic number, because the mean of its divisors is an integer number (121584348).

Almost surely, 2^405281155 is an apocalyptic number.

405281155 is a deficient number, since it is larger than the sum of its proper divisors (81056237).

405281155 is an equidigital number, since it uses as much as digits as its factorization.

405281155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81056236.

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

The square root of 405281155 is about 20131.5959377293. The cubic root of 405281155 is about 740.0347895745.

The spelling of 405281155 in words is "four hundred five million, two hundred eighty-one thousand, one hundred fifty-five".