5208405731 has 2 divisors, whose sum is σ = 5208405732. Its totient is φ = 5208405730.

The previous prime is 5208405649. The next prime is 5208405749. The reversal of 5208405731 is 1375048025.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5208405731 - 2¹⁸ = 5208143587 is a prime.

It is a super-2 number, since 2×5208405731² = 54254980517427288722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 5208405691 and 5208405700.

It is not a weakly prime, because it can be changed into another prime (5208405031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604202865 + 2604202866.

It is an arithmetic number, because the mean of its divisors is an integer number (2604202866).

Almost surely, 2^5208405731 is an apocalyptic number.

5208405731 is a deficient number, since it is larger than the sum of its proper divisors (1).

5208405731 is an equidigital number, since it uses as much as digits as its factorization.

5208405731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 5208405731 is about 72169.2852327082. The cubic root of 5208405731 is about 1733.4112174775.

The spelling of 5208405731 in words is "five billion, two hundred eight million, four hundred five thousand, seven hundred thirty-one".