215110213 has 2 divisors, whose sum is σ = 215110214. Its totient is φ = 215110212.

The previous prime is 215110201. The next prime is 215110223. The reversal of 215110213 is 312011512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206152164 + 8958049 = 14358^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 215110213 - 2²¹ = 213013061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215110223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107555106 + 107555107.

It is an arithmetic number, because the mean of its divisors is an integer number (107555107).

Almost surely, 2^215110213 is an apocalyptic number.

It is an amenable number.

215110213 is a deficient number, since it is larger than the sum of its proper divisors (1).

215110213 is an equidigital number, since it uses as much as digits as its factorization.

215110213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 215110213 is about 14666.6360492105. The cubic root of 215110213 is about 599.1749892636.

Adding to 215110213 its reverse (312011512), we get a palindrome (527121725).

The spelling of 215110213 in words is "two hundred fifteen million, one hundred ten thousand, two hundred thirteen".