215532253 has 2 divisors, whose sum is σ = 215532254. Its totient is φ = 215532252.

The previous prime is 215532227. The next prime is 215532259. The reversal of 215532253 is 352235512.

It is the 5994-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214974244 + 558009 = 14662^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 215532253 - 2²⁵ = 181977821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215532259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107766126 + 107766127.

It is an arithmetic number, because the mean of its divisors is an integer number (107766127).

Almost surely, 2^215532253 is an apocalyptic number.

It is an amenable number.

215532253 is a deficient number, since it is larger than the sum of its proper divisors (1).

215532253 is an equidigital number, since it uses as much as digits as its factorization.

215532253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 28.

The square root of 215532253 is about 14681.0167563422. The cubic root of 215532253 is about 599.5665879246.

Adding to 215532253 its reverse (352235512), we get a palindrome (567767765).

The spelling of 215532253 in words is "two hundred fifteen million, five hundred thirty-two thousand, two hundred fifty-three".