215232513345 has 24 divisors (see below), whose sum is σ = 385934164200. Its totient is φ = 110832374016.

The previous prime is 215232513329. The next prime is 215232513371. The reversal of 215232513345 is 543315232512.

215232513345 is a `hidden beast` number, since 21 + 52 + 3 + 251 + 334 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2396304 + 215230117041 = 1548^2 + 463929^2 .

It is not a de Polignac number, because 215232513345 - 2⁴ = 215232513329 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82463260 + ... + 82465869.

It is an arithmetic number, because the mean of its divisors is an integer number (16080590175).

Almost surely, 2^215232513345 is an apocalyptic number.

It is an amenable number.

215232513345 is a deficient number, since it is larger than the sum of its proper divisors (170701650855).

215232513345 is a wasteful number, since it uses less digits than its factorization.

215232513345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164929169 (or 164929166 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 215232513345 its reverse (543315232512), we get a palindrome (758547745857).

The spelling of 215232513345 in words is "two hundred fifteen billion, two hundred thirty-two million, five hundred thirteen thousand, three hundred forty-five".