215535241 has 2 divisors, whose sum is σ = 215535242. Its totient is φ = 215535240.

The previous prime is 215535227. The next prime is 215535251. The reversal of 215535241 is 142535512.

215535241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196140025 + 19395216 = 14005^2 + 4404^2 .

It is a cyclic number.

It is not a de Polignac number, because 215535241 - 2⁵ = 215535209 is a prime.

It is a super-2 number, since 2×215535241² = 92910880225856162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215535251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107767620 + 107767621.

It is an arithmetic number, because the mean of its divisors is an integer number (107767621).

Almost surely, 2^215535241 is an apocalyptic number.

It is an amenable number.

215535241 is a deficient number, since it is larger than the sum of its proper divisors (1).

215535241 is an equidigital number, since it uses as much as digits as its factorization.

215535241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 215535241 is about 14681.1185200583. The cubic root of 215535241 is about 599.5693585798.

The spelling of 215535241 in words is "two hundred fifteen million, five hundred thirty-five thousand, two hundred forty-one".