215205550345241 has 4 divisors (see below), whose sum is σ = 220210330585872. Its totient is φ = 210200770104612.

The previous prime is 215205550345213. The next prime is 215205550345301. The reversal of 215205550345241 is 142543055502512.

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 215205550345241 - 2²² = 215205546150937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215205550345192 and 215205550345201.

It is not an unprimeable number, because it can be changed into a prime (215205550345741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2502390120251 + ... + 2502390120336.

It is an arithmetic number, because the mean of its divisors is an integer number (55052582646468).

Almost surely, 2^{215205550345241} is an apocalyptic number.

It is an amenable number.

215205550345241 is a deficient number, since it is larger than the sum of its proper divisors (5004780240631).

215205550345241 is an equidigital number, since it uses as much as digits as its factorization.

215205550345241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004780240630.

The product of its (nonzero) digits is 1200000, while the sum is 44.

The spelling of 215205550345241 in words is "two hundred fifteen trillion, two hundred five billion, five hundred fifty million, three hundred forty-five thousand, two hundred forty-one".