215120505 has 8 divisors (see below), whose sum is σ = 344192832. Its totient is φ = 114730928.

The previous prime is 215120497. The next prime is 215120509. The reversal of 215120505 is 505021512.

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

It is a cyclic number.

It is not a de Polignac number, because 215120505 - 2³ = 215120497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215120509) 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, 7170669 + ... + 7170698.

It is an arithmetic number, because the mean of its divisors is an integer number (43024104).

Almost surely, 2^215120505 is an apocalyptic number.

It is an amenable number.

215120505 is a deficient number, since it is larger than the sum of its proper divisors (129072327).

215120505 is a wasteful number, since it uses less digits than its factorization.

215120505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14341375.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 215120505 is about 14666.9869093826. The cubic root of 215120505 is about 599.1845450018.

The spelling of 215120505 in words is "two hundred fifteen million, one hundred twenty thousand, five hundred five".