215136023 has 2 divisors, whose sum is σ = 215136024. Its totient is φ = 215136022.

The previous prime is 215136011. The next prime is 215136029. The reversal of 215136023 is 320631512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215136023 - 2¹⁰ = 215134999 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215136023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215136029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107568011 + 107568012.

It is an arithmetic number, because the mean of its divisors is an integer number (107568012).

Almost surely, 2^215136023 is an apocalyptic number.

215136023 is a deficient number, since it is larger than the sum of its proper divisors (1).

215136023 is an equidigital number, since it uses as much as digits as its factorization.

215136023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 215136023 is about 14667.5159110192. The cubic root of 215136023 is about 599.1989523099.

Adding to 215136023 its reverse (320631512), we get a palindrome (535767535).

The spelling of 215136023 in words is "two hundred fifteen million, one hundred thirty-six thousand, twenty-three".