215135655 has 16 divisors (see below), whose sum is σ = 393391104. Its totient is φ = 98347680.

The previous prime is 215135633. The next prime is 215135681. The reversal of 215135655 is 556531512.

It is not a de Polignac number, because 215135655 - 2¹³ = 215127463 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, 1024351 + ... + 1024560.

It is an arithmetic number, because the mean of its divisors is an integer number (24586944).

Almost surely, 2^215135655 is an apocalyptic number.

215135655 is a deficient number, since it is larger than the sum of its proper divisors (178255449).

215135655 is a wasteful number, since it uses less digits than its factorization.

215135655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048926.

The product of its digits is 22500, while the sum is 33.

The square root of 215135655 is about 14667.5033662856. The cubic root of 215135655 is about 599.1986106573.

The spelling of 215135655 in words is "two hundred fifteen million, one hundred thirty-five thousand, six hundred fifty-five".