215425505 has 8 divisors (see below), whose sum is σ = 258600552. Its totient is φ = 172280448.

The previous prime is 215425453. The next prime is 215425523. The reversal of 215425505 is 505524512.

215425505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5870929 + 209554576 = 2423^2 + 14476^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215425505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13829 + ... + 24941.

It is an arithmetic number, because the mean of its divisors is an integer number (32325069).

Almost surely, 2^215425505 is an apocalyptic number.

It is an amenable number.

215425505 is a deficient number, since it is larger than the sum of its proper divisors (43175047).

215425505 is a wasteful number, since it uses less digits than its factorization.

215425505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14995.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 215425505 is about 14677.3807268191. The cubic root of 215425505 is about 599.4675878872.

The spelling of 215425505 in words is "two hundred fifteen million, four hundred twenty-five thousand, five hundred five".