215255847 has 16 divisors (see below), whose sum is σ = 298902528. Its totient is φ = 137639040.

The previous prime is 215255837. The next prime is 215255857. The reversal of 215255847 is 748552512.

215255847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215255837) and next prime (215255857).

It is not a de Polignac number, because 215255847 - 2²⁰ = 214207271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215255837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268 + ... + 20750.

It is an arithmetic number, because the mean of its divisors is an integer number (18681408).

Almost surely, 2^215255847 is an apocalyptic number.

215255847 is a deficient number, since it is larger than the sum of its proper divisors (83646681).

215255847 is a wasteful number, since it uses less digits than its factorization.

215255847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20630.

The product of its digits is 112000, while the sum is 39.

The square root of 215255847 is about 14671.6000149950. The cubic root of 215255847 is about 599.3101766546.

It can be divided in two parts, 21525 and 5847, that added together give a palindrome (27372).

The spelling of 215255847 in words is "two hundred fifteen million, two hundred fifty-five thousand, eight hundred forty-seven".