855255291 has 8 divisors (see below), whose sum is σ = 1244007744. Its totient is φ = 518336520.

The previous prime is 855255241. The next prime is 855255301. The reversal of 855255291 is 192552558.

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

It is not a de Polignac number, because 855255291 - 2⁹ = 855254779 is a prime.

It is a super-2 number, since 2×855255291² = 1462923225566989362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855255241) 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, 12958381 + ... + 12958446.

It is an arithmetic number, because the mean of its divisors is an integer number (155500968).

Almost surely, 2^855255291 is an apocalyptic number.

855255291 is a deficient number, since it is larger than the sum of its proper divisors (388752453).

855255291 is a wasteful number, since it uses less digits than its factorization.

855255291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25916841.

The product of its digits is 180000, while the sum is 42.

The square root of 855255291 is about 29244.7480926063. The cubic root of 855255291 is about 949.2164512382.

It can be divided in two parts, 855255 and 291, that multiplied together give a triangular number (248879205 = T₂₂₃₁₀).

The spelling of 855255291 in words is "eight hundred fifty-five million, two hundred fifty-five thousand, two hundred ninety-one".