8517887242 has 4 divisors (see below), whose sum is σ = 12776830866. Its totient is φ = 4258943620.

The previous prime is 8517887237. The next prime is 8517887249. The reversal of 8517887242 is 2427887158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2427887158 = 2 ⋅1213943579.

It can be written as a sum of positive squares in only one way, i.e., 5489476281 + 3028410961 = 74091^2 + 55031^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8517887242.

It is not an unprimeable number, because it can be changed into a prime (8517887249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2129471809 + ... + 2129471812.

Almost surely, 2^8517887242 is an apocalyptic number.

8517887242 is a deficient number, since it is larger than the sum of its proper divisors (4258943624).

8517887242 is a wasteful number, since it uses less digits than its factorization.

8517887242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258943623.

The product of its digits is 2007040, while the sum is 52.

The square root of 8517887242 is about 92292.4007814295. The cubic root of 8517887242 is about 2042.2581078027.

The spelling of 8517887242 in words is "eight billion, five hundred seventeen million, eight hundred eighty-seven thousand, two hundred forty-two".