215252841 has 4 divisors (see below), whose sum is σ = 287003792. Its totient is φ = 143501892.

The previous prime is 215252839. The next prime is 215252857. The reversal of 215252841 is 148252512.

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 not a de Polignac number, because 215252841 - 2¹ = 215252839 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215252799 and 215252808.

It is not an unprimeable number, because it can be changed into a prime (215256841) 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 3 ways as a sum of consecutive naturals, for example, 35875471 + ... + 35875476.

It is an arithmetic number, because the mean of its divisors is an integer number (71750948).

Almost surely, 2^215252841 is an apocalyptic number.

It is an amenable number.

215252841 is a deficient number, since it is larger than the sum of its proper divisors (71750951).

215252841 is an equidigital number, since it uses as much as digits as its factorization.

215252841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71750950.

The product of its digits is 6400, while the sum is 30.

The square root of 215252841 is about 14671.4975718227. The cubic root of 215252841 is about 599.3073868972.

The spelling of 215252841 in words is "two hundred fifteen million, two hundred fifty-two thousand, eight hundred forty-one".