5251111493 has 2 divisors, whose sum is σ = 5251111494. Its totient is φ = 5251111492.

The previous prime is 5251111477. The next prime is 5251111543. The reversal of 5251111493 is 3941111525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5101244929 + 149866564 = 71423^2 + 12242^2 .

It is a cyclic number.

It is not a de Polignac number, because 5251111493 - 2⁴ = 5251111477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5251111433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625555746 + 2625555747.

It is an arithmetic number, because the mean of its divisors is an integer number (2625555747).

Almost surely, 2^5251111493 is an apocalyptic number.

It is an amenable number.

5251111493 is a deficient number, since it is larger than the sum of its proper divisors (1).

5251111493 is an equidigital number, since it uses as much as digits as its factorization.

5251111493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 5251111493 is about 72464.5533554165. The cubic root of 5251111493 is about 1738.1359670991.

Adding to 5251111493 its sum of digits (32), we get a palindrome (5251111525).

The spelling of 5251111493 in words is "five billion, two hundred fifty-one million, one hundred eleven thousand, four hundred ninety-three".