2145555113 has 4 divisors (see below), whose sum is σ = 2310597828. Its totient is φ = 1980512400.

The previous prime is 2145555089. The next prime is 2145555157. The reversal of 2145555113 is 3115555412.

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 212809744 + 1932745369 = 14588^2 + 43963^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145555113 - 2²⁰ = 2144506537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145555113.

It is not an unprimeable number, because it can be changed into a prime (2145555173) 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, 82521338 + ... + 82521363.

It is an arithmetic number, because the mean of its divisors is an integer number (577649457).

Almost surely, 2^2145555113 is an apocalyptic number.

It is an amenable number.

2145555113 is a deficient number, since it is larger than the sum of its proper divisors (165042715).

2145555113 is a wasteful number, since it uses less digits than its factorization.

2145555113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165042714.

The product of its digits is 15000, while the sum is 32.

The square root of 2145555113 is about 46320.1372299349. The cubic root of 2145555113 is about 1289.7728328227.

The spelling of 2145555113 in words is "two billion, one hundred forty-five million, five hundred fifty-five thousand, one hundred thirteen".