2145145133 has 4 divisors (see below), whose sum is σ = 2197465788. Its totient is φ = 2092824480.

The previous prime is 2145145063. The next prime is 2145145151. The reversal of 2145145133 is 3315415412.

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 41822089 + 2103323044 = 6467^2 + 45862^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145145133 - 2¹⁶ = 2145079597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145145096 and 2145145105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145145183) by changing a digit.

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, 26160266 + ... + 26160347.

It is an arithmetic number, because the mean of its divisors is an integer number (549366447).

Almost surely, 2^2145145133 is an apocalyptic number.

It is an amenable number.

2145145133 is a deficient number, since it is larger than the sum of its proper divisors (52320655).

2145145133 is an equidigital number, since it uses as much as digits as its factorization.

2145145133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52320654.

The product of its digits is 7200, while the sum is 29.

The square root of 2145145133 is about 46315.7115134810. The cubic root of 2145145133 is about 1289.6906761900.

The spelling of 2145145133 in words is "two billion, one hundred forty-five million, one hundred forty-five thousand, one hundred thirty-three".