2145543389 has 8 divisors (see below), whose sum is σ = 2345653632. Its totient is φ = 1946276640.

The previous prime is 2145543377. The next prime is 2145543397. The reversal of 2145543389 is 9833455412.

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

It is not a de Polignac number, because 2145543389 - 2⁸ = 2145543133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145543329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205544 + ... + 215729.

It is an arithmetic number, because the mean of its divisors is an integer number (293206704).

Almost surely, 2^2145543389 is an apocalyptic number.

It is an amenable number.

2145543389 is a deficient number, since it is larger than the sum of its proper divisors (200110243).

2145543389 is a wasteful number, since it uses less digits than its factorization.

2145543389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421747.

The product of its digits is 518400, while the sum is 44.

The square root of 2145543389 is about 46320.0106757328. The cubic root of 2145543389 is about 1289.7704835745.

The spelling of 2145543389 in words is "two billion, one hundred forty-five million, five hundred forty-three thousand, three hundred eighty-nine".