215042655 has 16 divisors (see below), whose sum is σ = 344582784. Its totient is φ = 114517920.

The previous prime is 215042651. The next prime is 215042687. The reversal of 215042655 is 556240512.

It is not a de Polignac number, because 215042655 - 2² = 215042651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215042651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9 + ... + 20738.

It is an arithmetic number, because the mean of its divisors is an integer number (21536424).

Almost surely, 2^215042655 is an apocalyptic number.

215042655 is a deficient number, since it is larger than the sum of its proper divisors (129540129).

215042655 is a wasteful number, since it uses less digits than its factorization.

215042655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 215042655 is about 14664.3327499072. The cubic root of 215042655 is about 599.1122566117.

The spelling of 215042655 in words is "two hundred fifteen million, forty-two thousand, six hundred fifty-five".