5220187391 has 4 divisors (see below), whose sum is σ = 5226100152. Its totient is φ = 5214274632.

The previous prime is 5220187381. The next prime is 5220187397. The reversal of 5220187391 is 1937810225.

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 5220187391 - 2¹⁸ = 5219925247 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 (5220187397) 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, 2955056 + ... + 2956821.

It is an arithmetic number, because the mean of its divisors is an integer number (1306525038).

Almost surely, 2^5220187391 is an apocalyptic number.

5220187391 is a deficient number, since it is larger than the sum of its proper divisors (5912761).

5220187391 is an equidigital number, since it uses as much as digits as its factorization.

5220187391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912760.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 5220187391 is about 72250.8642924083. The cubic root of 5220187391 is about 1734.7172525756.

The spelling of 5220187391 in words is "five billion, two hundred twenty million, one hundred eighty-seven thousand, three hundred ninety-one".