2145132305 has 4 divisors (see below), whose sum is σ = 2574158772. Its totient is φ = 1716105840.

The previous prime is 2145132293. The next prime is 2145132361. The reversal of 2145132305 is 5032315412.

It is a happy number.

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 368678401 + 1776453904 = 19201^2 + 42148^2 .

It is not a de Polignac number, because 2145132305 - 2²⁰ = 2144083729 is a prime.

It is a super-2 number, since 2×2145132305² = 9203185211909226050, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 214513226 + ... + 214513235.

It is an arithmetic number, because the mean of its divisors is an integer number (643539693).

Almost surely, 2^2145132305 is an apocalyptic number.

It is an amenable number.

2145132305 is a deficient number, since it is larger than the sum of its proper divisors (429026467).

2145132305 is an equidigital number, since it uses as much as digits as its factorization.

2145132305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429026466.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2145132305 is about 46315.5730289500. The cubic root of 2145132305 is about 1289.6881053950.

Adding to 2145132305 its reverse (5032315412), we get a palindrome (7177447717).

The spelling of 2145132305 in words is "two billion, one hundred forty-five million, one hundred thirty-two thousand, three hundred five".