5242191887 has 4 divisors (see below), whose sum is σ = 5250345240. Its totient is φ = 5234038536.

The previous prime is 5242191883. The next prime is 5242191907. The reversal of 5242191887 is 7881912425.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5242191887 - 2² = 5242191883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5242191881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4075712 + ... + 4076997.

It is an arithmetic number, because the mean of its divisors is an integer number (1312586310).

Almost surely, 2^5242191887 is an apocalyptic number.

5242191887 is a deficient number, since it is larger than the sum of its proper divisors (8153353).

5242191887 is an equidigital number, since it uses as much as digits as its factorization.

5242191887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8153352.

The product of its digits is 322560, while the sum is 47.

The square root of 5242191887 is about 72402.9825835925. The cubic root of 5242191887 is about 1737.1512692590.

The spelling of 5242191887 in words is "five billion, two hundred forty-two million, one hundred ninety-one thousand, eight hundred eighty-seven".