5218812387 has 24 divisors (see below), whose sum is σ = 7736169168. Its totient is φ = 3388185600.

The previous prime is 5218812341. The next prime is 5218812419. The reversal of 5218812387 is 7832188125.

5218812387 is a `hidden beast` number, since 521 + 88 + 12 + 38 + 7 = 666.

It is not a de Polignac number, because 5218812387 - 2⁶ = 5218812323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5218862387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195187 + ... + 220307.

It is an arithmetic number, because the mean of its divisors is an integer number (322340382).

Almost surely, 2^5218812387 is an apocalyptic number.

5218812387 is a deficient number, since it is larger than the sum of its proper divisors (2517356781).

5218812387 is a wasteful number, since it uses less digits than its factorization.

5218812387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25731 (or 25728 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 5218812387 is about 72241.3481809414. The cubic root of 5218812387 is about 1734.5649302904.

The spelling of 5218812387 in words is "five billion, two hundred eighteen million, eight hundred twelve thousand, three hundred eighty-seven".