2155205201 has 4 divisors (see below), whose sum is σ = 2155328112. Its totient is φ = 2155082292.

The previous prime is 2155205167. The next prime is 2155205203. The reversal of 2155205201 is 1025025512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2155205201 - 2¹⁴ = 2155188817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155205203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29675 + ... + 72048.

It is an arithmetic number, because the mean of its divisors is an integer number (538832028).

Almost surely, 2^2155205201 is an apocalyptic number.

It is an amenable number.

2155205201 is a deficient number, since it is larger than the sum of its proper divisors (122911).

2155205201 is a wasteful number, since it uses less digits than its factorization.

2155205201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122910.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2155205201 is about 46424.1876719453. The cubic root of 2155205201 is about 1291.7036163933.

The spelling of 2155205201 in words is "two billion, one hundred fifty-five million, two hundred five thousand, two hundred one".