5131035561 has 4 divisors (see below), whose sum is σ = 6841380752. Its totient is φ = 3420690372.

The previous prime is 5131035527. The next prime is 5131035563. The reversal of 5131035561 is 1655301315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5131035561 - 2²⁹ = 4594164649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5131035563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855172591 + ... + 855172596.

It is an arithmetic number, because the mean of its divisors is an integer number (1710345188).

Almost surely, 2^5131035561 is an apocalyptic number.

It is an amenable number.

5131035561 is a deficient number, since it is larger than the sum of its proper divisors (1710345191).

5131035561 is a wasteful number, since it uses less digits than its factorization.

5131035561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710345190.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 5131035561 is about 71631.2470992932. The cubic root of 5131035561 is about 1724.7851652637.

Adding to 5131035561 its reverse (1655301315), we get a palindrome (6786336876).

The spelling of 5131035561 in words is "five billion, one hundred thirty-one million, thirty-five thousand, five hundred sixty-one".