5125144991 has 2 divisors, whose sum is σ = 5125144992. Its totient is φ = 5125144990.

The previous prime is 5125144979. The next prime is 5125145009. The reversal of 5125144991 is 1994415215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5125144991 - 2¹⁰ = 5125143967 is a prime.

It is a super-2 number, since 2×5125144991² = 52534222357544780162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5125144391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2562572495 + 2562572496.

It is an arithmetic number, because the mean of its divisors is an integer number (2562572496).

Almost surely, 2^5125144991 is an apocalyptic number.

5125144991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5125144991 is an equidigital number, since it uses as much as digits as its factorization.

5125144991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 5125144991 is about 71590.1179702897. The cubic root of 5125144991 is about 1724.1248789150.

The spelling of 5125144991 in words is "five billion, one hundred twenty-five million, one hundred forty-four thousand, nine hundred ninety-one".