5191191251 has 2 divisors, whose sum is σ = 5191191252. Its totient is φ = 5191191250.

The previous prime is 5191191227. The next prime is 5191191263. The reversal of 5191191251 is 1521911915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5191191251 - 2¹⁴ = 5191174867 is a prime.

It is not a weakly prime, because it can be changed into another prime (5191191851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595595625 + 2595595626.

It is an arithmetic number, because the mean of its divisors is an integer number (2595595626).

Almost surely, 2^5191191251 is an apocalyptic number.

5191191251 is a deficient number, since it is larger than the sum of its proper divisors (1).

5191191251 is an equidigital number, since it uses as much as digits as its factorization.

5191191251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 35.

The square root of 5191191251 is about 72049.9219361132. The cubic root of 5191191251 is about 1731.4993907373.

The spelling of 5191191251 in words is "five billion, one hundred ninety-one million, one hundred ninety-one thousand, two hundred fifty-one".