4520138243 has 2 divisors, whose sum is σ = 4520138244. Its totient is φ = 4520138242.

The previous prime is 4520138239. The next prime is 4520138257. The reversal of 4520138243 is 3428310254.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4520138243 - 2² = 4520138239 is a prime.

It is a super-3 number, since 3×4520138243³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (4520131243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260069121 + 2260069122.

It is an arithmetic number, because the mean of its divisors is an integer number (2260069122).

Almost surely, 2^4520138243 is an apocalyptic number.

4520138243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4520138243 is an equidigital number, since it uses as much as digits as its factorization.

4520138243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 4520138243 is about 67231.9733683312. The cubic root of 4520138243 is about 1653.4227380447.

Adding to 4520138243 its reverse (3428310254), we get a palindrome (7948448497).

The spelling of 4520138243 in words is "four billion, five hundred twenty million, one hundred thirty-eight thousand, two hundred forty-three".