215115505 has 8 divisors (see below), whose sum is σ = 281605824. Its totient is φ = 156447600.

The previous prime is 215115503. The next prime is 215115517. The reversal of 215115505 is 505511512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215115505 - 2¹ = 215115503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215115505.

It is not an unprimeable number, because it can be changed into a prime (215115503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1955541 + ... + 1955650.

It is an arithmetic number, because the mean of its divisors is an integer number (35200728).

Almost surely, 2^215115505 is an apocalyptic number.

It is an amenable number.

215115505 is a deficient number, since it is larger than the sum of its proper divisors (66490319).

215115505 is a wasteful number, since it uses less digits than its factorization.

215115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911207.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 215115505 is about 14666.8164575684. The cubic root of 215115505 is about 599.1799027263.

The spelling of 215115505 in words is "two hundred fifteen million, one hundred fifteen thousand, five hundred five".