215706241 has 2 divisors, whose sum is σ = 215706242. Its totient is φ = 215706240.

The previous prime is 215706233. The next prime is 215706269. The reversal of 215706241 is 142607512.

215706241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (215706269) can be obtained adding 215706241 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130051216 + 85655025 = 11404^2 + 9255^2 .

It is a cyclic number.

It is not a de Polignac number, because 215706241 - 2³ = 215706233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (215706341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107853120 + 107853121.

It is an arithmetic number, because the mean of its divisors is an integer number (107853121).

Almost surely, 2^215706241 is an apocalyptic number.

It is an amenable number.

215706241 is a deficient number, since it is larger than the sum of its proper divisors (1).

215706241 is an equidigital number, since it uses as much as digits as its factorization.

215706241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 215706241 is about 14686.9411723476. The cubic root of 215706241 is about 599.7278775269.

The spelling of 215706241 in words is "two hundred fifteen million, seven hundred six thousand, two hundred forty-one".