215255645 has 32 divisors (see below), whose sum is σ = 288645120. Its totient is φ = 152792640.

The previous prime is 215255627. The next prime is 215255647. The reversal of 215255645 is 546552512.

215255645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215255645 - 2¹⁰ = 215254621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215255647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464684 + ... + 465146.

It is an arithmetic number, because the mean of its divisors is an integer number (9020160).

Almost surely, 2^215255645 is an apocalyptic number.

It is an amenable number.

215255645 is a deficient number, since it is larger than the sum of its proper divisors (73389475).

215255645 is a wasteful number, since it uses less digits than its factorization.

215255645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

The product of its digits is 60000, while the sum is 35.

The square root of 215255645 is about 14671.5931309453. The cubic root of 215255645 is about 599.3099891867.

The spelling of 215255645 in words is "two hundred fifteen million, two hundred fifty-five thousand, six hundred forty-five".