215591055 has 16 divisors (see below), whose sum is σ = 345237504. Its totient is φ = 114884640.

The previous prime is 215591041. The next prime is 215591111. The reversal of 215591055 is 550195512.

It is not a de Polignac number, because 215591055 - 2¹¹ = 215589007 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, 14490 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (21577344).

Almost surely, 2^215591055 is an apocalyptic number.

215591055 is a deficient number, since it is larger than the sum of its proper divisors (129646449).

215591055 is a wasteful number, since it uses less digits than its factorization.

215591055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12166.

The product of its (nonzero) digits is 11250, while the sum is 33.

The square root of 215591055 is about 14683.0192739777. The cubic root of 215591055 is about 599.6211080073.

The spelling of 215591055 in words is "two hundred fifteen million, five hundred ninety-one thousand, fifty-five".