215500540515 has 16 divisors (see below), whose sum is σ = 371324008608. Its totient is φ = 106092573696.

The previous prime is 215500540487. The next prime is 215500540517. The reversal of 215500540515 is 515045005512.

It is not a de Polignac number, because 215500540515 - 2⁸ = 215500540259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215500540517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552565294 + ... + 552565683.

It is an arithmetic number, because the mean of its divisors is an integer number (23207750538).

Almost surely, 2^215500540515 is an apocalyptic number.

215500540515 is a deficient number, since it is larger than the sum of its proper divisors (155823468093).

215500540515 is a wasteful number, since it uses less digits than its factorization.

215500540515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105130998.

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 215500540515 in words is "two hundred fifteen billion, five hundred million, five hundred forty thousand, five hundred fifteen".