5191625581 has 2 divisors, whose sum is σ = 5191625582. Its totient is φ = 5191625580.

The previous prime is 5191625503. The next prime is 5191625587. The reversal of 5191625581 is 1855261915.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4122924100 + 1068701481 = 64210^2 + 32691^2 .

It is a cyclic number.

It is not a de Polignac number, because 5191625581 - 2²¹ = 5189528429 is a prime.

It is a super-2 number, since 2×5191625581² = 53905952346587175122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5191625587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595812790 + 2595812791.

It is an arithmetic number, because the mean of its divisors is an integer number (2595812791).

Almost surely, 2^5191625581 is an apocalyptic number.

It is an amenable number.

5191625581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5191625581 is an equidigital number, since it uses as much as digits as its factorization.

5191625581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 43.

The square root of 5191625581 is about 72052.9359637760. The cubic root of 5191625581 is about 1731.5476790217.

The spelling of 5191625581 in words is "five billion, one hundred ninety-one million, six hundred twenty-five thousand, five hundred eighty-one".