215238241 has 9 divisors (see below), whose sum is σ = 228909331. Its totient is φ = 202342432.

The previous prime is 215238217. The next prime is 215238253. The reversal of 215238241 is 142832512.

The square root of 215238241 is 14671.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 167573025 + 47665216 = 12945^2 + 6904^2 .

It is not a de Polignac number, because 215238241 - 2⁷ = 215238113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215238211) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 248976 + ... + 249838.

Almost surely, 2^215238241 is an apocalyptic number.

215238241 is the 14671-st square number.

215238241 is the 7336-th centered octagonal number.

It is an amenable number.

215238241 is a deficient number, since it is larger than the sum of its proper divisors (13671090).

215238241 is an frugal number, since it uses more digits than its factorization.

215238241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 880 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The cubic root of 215238241 is about 599.2938368079.

The spelling of 215238241 in words is "two hundred fifteen million, two hundred thirty-eight thousand, two hundred forty-one".