2155100201 has 4 divisors (see below), whose sum is σ = 2179314900. Its totient is φ = 2130885504.

The previous prime is 2155100197. The next prime is 2155100231. The reversal of 2155100201 is 1020015512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 879181801 + 1275918400 = 29651^2 + 35720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155100201 - 2² = 2155100197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155100201.

It is not an unprimeable number, because it can be changed into a prime (2155100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12107216 + ... + 12107393.

It is an arithmetic number, because the mean of its divisors is an integer number (544828725).

Almost surely, 2^2155100201 is an apocalyptic number.

It is an amenable number.

2155100201 is a deficient number, since it is larger than the sum of its proper divisors (24214699).

2155100201 is an equidigital number, since it uses as much as digits as its factorization.

2155100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24214698.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 2155100201 is about 46423.0567821638. The cubic root of 2155100201 is about 1291.6826391051.

Adding to 2155100201 its reverse (1020015512), we get a palindrome (3175115713).

The spelling of 2155100201 in words is "two billion, one hundred fifty-five million, one hundred thousand, two hundred one".