291280855 has 16 divisors (see below), whose sum is σ = 372501504. Its totient is φ = 218146720.

The previous prime is 291280853. The next prime is 291280879. The reversal of 291280855 is 558082192.

It is not a de Polignac number, because 291280855 - 2¹ = 291280853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291280853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21541 + ... + 32350.

It is an arithmetic number, because the mean of its divisors is an integer number (23281344).

Almost surely, 2^291280855 is an apocalyptic number.

291280855 is a deficient number, since it is larger than the sum of its proper divisors (81220649).

291280855 is a wasteful number, since it uses less digits than its factorization.

291280855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53966.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 291280855 is about 17066.9521297741. The cubic root of 291280855 is about 662.8836595849.

The spelling of 291280855 in words is "two hundred ninety-one million, two hundred eighty thousand, eight hundred fifty-five".