2155361311 has 16 divisors (see below), whose sum is σ = 2295807840. Its totient is φ = 2017699200.

The previous prime is 2155361249. The next prime is 2155361321. The reversal of 2155361311 is 1131635512.

It is a cyclic number.

It is not a de Polignac number, because 2155361311 - 2⁷ = 2155361183 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 2155361311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155361321) 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 15 ways as a sum of consecutive naturals, for example, 1482661 + ... + 1484113.

It is an arithmetic number, because the mean of its divisors is an integer number (143487990).

Almost surely, 2^2155361311 is an apocalyptic number.

2155361311 is a deficient number, since it is larger than the sum of its proper divisors (140446529).

2155361311 is a wasteful number, since it uses less digits than its factorization.

2155361311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346.

The product of its digits is 2700, while the sum is 28.

The square root of 2155361311 is about 46425.8689848666. The cubic root of 2155361311 is about 1291.7348033669.

Adding to 2155361311 its reverse (1131635512), we get a palindrome (3286996823).

The spelling of 2155361311 in words is "two billion, one hundred fifty-five million, three hundred sixty-one thousand, three hundred eleven".