2155532113 has 4 divisors (see below), whose sum is σ = 2463465280. Its totient is φ = 1847598948.

The previous prime is 2155532089. The next prime is 2155532131. The reversal of 2155532113 is 3112355512.

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 2155532113 - 2⁹ = 2155531601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155532413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153966573 + ... + 153966586.

It is an arithmetic number, because the mean of its divisors is an integer number (615866320).

Almost surely, 2^2155532113 is an apocalyptic number.

It is an amenable number.

2155532113 is a deficient number, since it is larger than the sum of its proper divisors (307933167).

2155532113 is an equidigital number, since it uses as much as digits as its factorization.

2155532113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307933166.

The product of its digits is 4500, while the sum is 28.

The square root of 2155532113 is about 46427.7084616504. The cubic root of 2155532113 is about 1291.7689237190.

Adding to 2155532113 its reverse (3112355512), we get a palindrome (5267887625).

The spelling of 2155532113 in words is "two billion, one hundred fifty-five million, five hundred thirty-two thousand, one hundred thirteen".