2145138543 has 6 divisors (see below), whose sum is σ = 3098533464. Its totient is φ = 1430092356.

The previous prime is 2145138533. The next prime is 2145138559. The reversal of 2145138543 is 3458315412.

2145138543 is a `hidden beast` number, since 21 + 4 + 513 + 85 + 43 = 666.

It is not a de Polignac number, because 2145138543 - 2²⁰ = 2144089967 is a prime.

It is a super-3 number, since 3×2145138543³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145138498 and 2145138507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145138533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119174355 + ... + 119174372.

It is an arithmetic number, because the mean of its divisors is an integer number (516422244).

Almost surely, 2^2145138543 is an apocalyptic number.

2145138543 is a deficient number, since it is larger than the sum of its proper divisors (953394921).

2145138543 is a wasteful number, since it uses less digits than its factorization.

2145138543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238348733 (or 238348730 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 2145138543 is about 46315.6403712612. The cubic root of 2145138543 is about 1289.6893555225.

The spelling of 2145138543 in words is "two billion, one hundred forty-five million, one hundred thirty-eight thousand, five hundred forty-three".