215155245 has 16 divisors (see below), whose sum is σ = 344768832. Its totient is φ = 114576000.

The previous prime is 215155207. The next prime is 215155253. The reversal of 215155245 is 542551512.

It is not a de Polignac number, because 215155245 - 2¹⁰ = 215154221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256 + ... + 20745.

It is an arithmetic number, because the mean of its divisors is an integer number (21548052).

Almost surely, 2^215155245 is an apocalyptic number.

It is an amenable number.

215155245 is a deficient number, since it is larger than the sum of its proper divisors (129613587).

215155245 is a wasteful number, since it uses less digits than its factorization.

215155245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21692.

The product of its digits is 10000, while the sum is 30.

The square root of 215155245 is about 14668.1711538965. The cubic root of 215155245 is about 599.2167975458.

The spelling of 215155245 in words is "two hundred fifteen million, one hundred fifty-five thousand, two hundred forty-five".