215245241 has 4 divisors (see below), whose sum is σ = 217376484. Its totient is φ = 213114000.

The previous prime is 215245237. The next prime is 215245291. The reversal of 215245241 is 142542512.

215245241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101929216 + 113316025 = 10096^2 + 10645^2 .

It is a cyclic number.

It is not a de Polignac number, because 215245241 - 2² = 215245237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215245241.

It is not an unprimeable number, because it can be changed into a prime (215245291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065470 + ... + 1065671.

It is an arithmetic number, because the mean of its divisors is an integer number (54344121).

Almost surely, 2^215245241 is an apocalyptic number.

It is an amenable number.

215245241 is a deficient number, since it is larger than the sum of its proper divisors (2131243).

215245241 is a wasteful number, since it uses less digits than its factorization.

215245241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131242.

The product of its digits is 3200, while the sum is 26.

The square root of 215245241 is about 14671.2385639386. The cubic root of 215245241 is about 599.3003335025.

Adding to 215245241 its reverse (142542512), we get a palindrome (357787753).

The spelling of 215245241 in words is "two hundred fifteen million, two hundred forty-five thousand, two hundred forty-one".