215053823 has 2 divisors, whose sum is σ = 215053824. Its totient is φ = 215053822.

The previous prime is 215053771. The next prime is 215053831. The reversal of 215053823 is 328350512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215053823 - 2¹⁸ = 214791679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215055823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107526911 + 107526912.

It is an arithmetic number, because the mean of its divisors is an integer number (107526912).

Almost surely, 2^215053823 is an apocalyptic number.

215053823 is a deficient number, since it is larger than the sum of its proper divisors (1).

215053823 is an equidigital number, since it uses as much as digits as its factorization.

215053823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 215053823 is about 14664.7135328311. The cubic root of 215053823 is about 599.1226278407.

The spelling of 215053823 in words is "two hundred fifteen million, fifty-three thousand, eight hundred twenty-three".