215023543 has 16 divisors (see below), whose sum is σ = 254177280. Its totient is φ = 178079616.

The previous prime is 215023541. The next prime is 215023561. The reversal of 215023543 is 345320512.

It is not a de Polignac number, because 215023543 - 2¹ = 215023541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215023541) 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 in 15 ways as a sum of consecutive naturals, for example, 21855 + ... + 30127.

It is an arithmetic number, because the mean of its divisors is an integer number (15886080).

Almost surely, 2^215023543 is an apocalyptic number.

215023543 is a deficient number, since it is larger than the sum of its proper divisors (39153737).

215023543 is an equidigital number, since it uses as much as digits as its factorization.

215023543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 215023543 is about 14663.6810862757. The cubic root of 215023543 is about 599.0945073072.

The spelling of 215023543 in words is "two hundred fifteen million, twenty-three thousand, five hundred forty-three".