5221172387 has 2 divisors, whose sum is σ = 5221172388. Its totient is φ = 5221172386.

The previous prime is 5221172381. The next prime is 5221172501. The reversal of 5221172387 is 7832711225.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5221172387 - 2¹⁸ = 5220910243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5221172387.

It is not a weakly prime, because it can be changed into another prime (5221172381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610586193 + 2610586194.

It is an arithmetic number, because the mean of its divisors is an integer number (2610586194).

Almost surely, 2^5221172387 is an apocalyptic number.

5221172387 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221172387 is an equidigital number, since it uses as much as digits as its factorization.

5221172387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 5221172387 is about 72257.6804706600. The cubic root of 5221172387 is about 1734.8263535182.

The spelling of 5221172387 in words is "five billion, two hundred twenty-one million, one hundred seventy-two thousand, three hundred eighty-seven".