5209145238 has 32 divisors (see below), whose sum is σ = 11502352512. Its totient is φ = 1559508800.

The previous prime is 5209145237. The next prime is 5209145257. The reversal of 5209145238 is 8325419025.

It is a super-2 number, since 2×5209145238² = 54270388221156153288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5209145196 and 5209145205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5209145231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469983 + ... + 480938.

It is an arithmetic number, because the mean of its divisors is an integer number (359448516).

Almost surely, 2^5209145238 is an apocalyptic number.

5209145238 is an abundant number, since it is smaller than the sum of its proper divisors (6293207274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5209145238 is a wasteful number, since it uses less digits than its factorization.

5209145238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951020.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 5209145238 is about 72174.4084700387. The cubic root of 5209145238 is about 1733.4932521174.

The spelling of 5209145238 in words is "five billion, two hundred nine million, one hundred forty-five thousand, two hundred thirty-eight".