3215205055 has 4 divisors (see below), whose sum is σ = 3858246072. Its totient is φ = 2572164040.

The previous prime is 3215205017. The next prime is 3215205067. The reversal of 3215205055 is 5505025123.

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

It is not a de Polignac number, because 3215205055 - 2¹¹ = 3215203007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321520501 + ... + 321520510.

It is an arithmetic number, because the mean of its divisors is an integer number (964561518).

Almost surely, 2^3215205055 is an apocalyptic number.

3215205055 is a deficient number, since it is larger than the sum of its proper divisors (643041017).

3215205055 is an equidigital number, since it uses as much as digits as its factorization.

3215205055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643041016.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 3215205055 is about 56702.7781947234. The cubic root of 3215205055 is about 1475.9429083596.

The spelling of 3215205055 in words is "three billion, two hundred fifteen million, two hundred five thousand, fifty-five".