215555245241 has 4 divisors (see below), whose sum is σ = 246348851712. Its totient is φ = 184761638772.

The previous prime is 215555245223. The next prime is 215555245261. The reversal of 215555245241 is 142542555512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215555245241 - 2⁶ = 215555245177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215555245261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15396803225 + ... + 15396803238.

It is an arithmetic number, because the mean of its divisors is an integer number (61587212928).

Almost surely, 2^215555245241 is an apocalyptic number.

It is an amenable number.

215555245241 is a deficient number, since it is larger than the sum of its proper divisors (30793606471).

215555245241 is an equidigital number, since it uses as much as digits as its factorization.

215555245241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30793606470.

The product of its digits is 400000, while the sum is 41.

The spelling of 215555245241 in words is "two hundred fifteen billion, five hundred fifty-five million, two hundred forty-five thousand, two hundred forty-one".