215525132045 has 32 divisors (see below), whose sum is σ = 279366796800. Its totient is φ = 159130580224.

The previous prime is 215525132027. The next prime is 215525132047. The reversal of 215525132045 is 540231525512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215525132045 - 2³² = 211230164749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215525131996 and 215525132014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215525132047) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5178539 + ... + 5219991.

It is an arithmetic number, because the mean of its divisors is an integer number (8730212400).

Almost surely, 2^215525132045 is an apocalyptic number.

It is an amenable number.

215525132045 is a deficient number, since it is larger than the sum of its proper divisors (63841664755).

215525132045 is a wasteful number, since it uses less digits than its factorization.

215525132045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43069.

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 215525132045 its reverse (540231525512), we get a palindrome (755756657557).

The spelling of 215525132045 in words is "two hundred fifteen billion, five hundred twenty-five million, one hundred thirty-two thousand, forty-five".