5215645387 has 2 divisors, whose sum is σ = 5215645388. Its totient is φ = 5215645386.

The previous prime is 5215645349. The next prime is 5215645399. The reversal of 5215645387 is 7835465125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5215645387 - 2¹¹ = 5215643339 is a prime.

It is not a weakly prime, because it can be changed into another prime (5215645307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607822693 + 2607822694.

It is an arithmetic number, because the mean of its divisors is an integer number (2607822694).

Almost surely, 2^5215645387 is an apocalyptic number.

5215645387 is a deficient number, since it is larger than the sum of its proper divisors (1).

5215645387 is an equidigital number, since it uses as much as digits as its factorization.

5215645387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 46.

The square root of 5215645387 is about 72219.4252746448. The cubic root of 5215645387 is about 1734.2139897376.

The spelling of 5215645387 in words is "five billion, two hundred fifteen million, six hundred forty-five thousand, three hundred eighty-seven".