52131031213 has 4 divisors (see below), whose sum is σ = 52136084700. Its totient is φ = 52125977728.

The previous prime is 52131031187. The next prime is 52131031217. The reversal of 52131031213 is 31213013125.

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 28953404649 + 23177626564 = 170157^2 + 152242^2 .

It is a cyclic number.

It is not a de Polignac number, because 52131031213 - 2²¹ = 52128934061 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 (52131031217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511238 + ... + 2531911.

It is an arithmetic number, because the mean of its divisors is an integer number (13034021175).

Almost surely, 2^52131031213 is an apocalyptic number.

It is an amenable number.

52131031213 is a deficient number, since it is larger than the sum of its proper divisors (5053487).

52131031213 is a wasteful number, since it uses less digits than its factorization.

52131031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053486.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 52131031213 its reverse (31213013125), we get a palindrome (83344044338).

The spelling of 52131031213 in words is "fifty-two billion, one hundred thirty-one million, thirty-one thousand, two hundred thirteen".