5206315921 has 2 divisors, whose sum is σ = 5206315922. Its totient is φ = 5206315920.

The previous prime is 5206315847. The next prime is 5206315927. The reversal of 5206315921 is 1295136025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4884472321 + 321843600 = 69889^2 + 17940^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206315921 - 2²³ = 5197927313 is a prime.

It is not a weakly prime, because it can be changed into another prime (5206315927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603157960 + 2603157961.

It is an arithmetic number, because the mean of its divisors is an integer number (2603157961).

Almost surely, 2^5206315921 is an apocalyptic number.

It is an amenable number.

5206315921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206315921 is an equidigital number, since it uses as much as digits as its factorization.

5206315921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 5206315921 is about 72154.8052523184. The cubic root of 5206315921 is about 1733.1793496798.

The spelling of 5206315921 in words is "five billion, two hundred six million, three hundred fifteen thousand, nine hundred twenty-one".