5131000009 has 4 divisors (see below), whose sum is σ = 5170168080. Its totient is φ = 5091831940.

The previous prime is 5131000003. The next prime is 5131000019. The reversal of 5131000009 is 9000001315.

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 a cyclic number.

It is not a de Polignac number, because 5131000009 - 2³ = 5131000001 is a prime.

It is a super-2 number, since 2×5131000009² = 52654322184716000162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5131000009.

It is not an unprimeable number, because it can be changed into a prime (5131000001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19583839 + ... + 19584100.

It is an arithmetic number, because the mean of its divisors is an integer number (1292542020).

Almost surely, 2^5131000009 is an apocalyptic number.

It is an amenable number.

5131000009 is a deficient number, since it is larger than the sum of its proper divisors (39168071).

5131000009 is a wasteful number, since it uses less digits than its factorization.

5131000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39168070.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 5131000009 is about 71630.9989390068. The cubic root of 5131000009 is about 1724.7811816816.

The spelling of 5131000009 in words is "five billion, one hundred thirty-one million, nine", and thus it is an aban number.