51000543889 has 9 divisors (see below), whose sum is σ = 51993176529. Its totient is φ = 50026526160.

The previous prime is 51000543877. The next prime is 51000543901. The reversal of 51000543889 is 98834500015.

The square root of 51000543889 is 225833.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (51000543877) and next prime (51000543901).

It can be written as a sum of positive squares in 4 ways, for example, as 27777222225 + 23223321664 = 166665^2 + 152392^2 .

It is not a de Polignac number, because 51000543889 - 2¹³ = 51000535697 is a prime.

It is a super-3 number, since 3×51000543889³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51000543089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11967019 + ... + 11971279.

Almost surely, 2^51000543889 is an apocalyptic number.

51000543889 is the 225833-rd square number.

51000543889 is the 112917-th centered octagonal number.

It is an amenable number.

51000543889 is a deficient number, since it is larger than the sum of its proper divisors (992632640).

51000543889 is an frugal number, since it uses more digits than its factorization.

51000543889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628 (or 4314 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 51000543889 in words is "fifty-one billion, five hundred forty-three thousand, eight hundred eighty-nine".