655944215 has 4 divisors (see below), whose sum is σ = 787133064. Its totient is φ = 524755368.

The previous prime is 655944209. The next prime is 655944227. The reversal of 655944215 is 512449556.

655944215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655944215 - 2¹⁶ = 655878679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65594417 + ... + 65594426.

It is an arithmetic number, because the mean of its divisors is an integer number (196783266).

Almost surely, 2^655944215 is an apocalyptic number.

655944215 is a deficient number, since it is larger than the sum of its proper divisors (131188849).

655944215 is a wasteful number, since it uses less digits than its factorization.

655944215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131188848.

The product of its digits is 216000, while the sum is 41.

The square root of 655944215 is about 25611.4079074150. The cubic root of 655944215 is about 868.8716666893.

The spelling of 655944215 in words is "six hundred fifty-five million, nine hundred forty-four thousand, two hundred fifteen".