2113213145 has 8 divisors (see below), whose sum is σ = 2546930760. Its totient is φ = 1683187200.

The previous prime is 2113213129. The next prime is 2113213183. The reversal of 2113213145 is 5413123112.

It can be written as a sum of positive squares in 4 ways, for example, as 87853129 + 2025360016 = 9373^2 + 45004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2113213145 - 2⁴ = 2113213129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113213145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921656 + ... + 923945.

It is an arithmetic number, because the mean of its divisors is an integer number (318366345).

Almost surely, 2^2113213145 is an apocalyptic number.

It is an amenable number.

2113213145 is a deficient number, since it is larger than the sum of its proper divisors (433717615).

2113213145 is a wasteful number, since it uses less digits than its factorization.

2113213145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845835.

The product of its digits is 720, while the sum is 23.

The square root of 2113213145 is about 45969.6981173468. The cubic root of 2113213145 is about 1283.2593418108.

Adding to 2113213145 its reverse (5413123112), we get a palindrome (7526336257).

The spelling of 2113213145 in words is "two billion, one hundred thirteen million, two hundred thirteen thousand, one hundred forty-five".