215152540123543 has 16 divisors (see below), whose sum is σ = 244919695401216. Its totient is φ = 187086896663040.

The previous prime is 215152540123513. The next prime is 215152540123603. The reversal of 215152540123543 is 345321045251512.

It is a de Polignac number, because none of the positive numbers 2^k-215152540123543 is a prime.

It is a super-2 number, since 2×215152540123543² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215152540123543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215152540123513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15919180 + ... + 26148142.

It is an arithmetic number, because the mean of its divisors is an integer number (15307480962576).

Almost surely, 2^{215152540123543} is an apocalyptic number.

215152540123543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

215152540123543 is a deficient number, since it is larger than the sum of its proper divisors (29767155277673).

215152540123543 is a wasteful number, since it uses less digits than its factorization.

215152540123543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312134.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 215152540123543 in words is "two hundred fifteen trillion, one hundred fifty-two billion, five hundred forty million, one hundred twenty-three thousand, five hundred forty-three".