5143211561 has 4 divisors (see below), whose sum is σ = 5152445892. Its totient is φ = 5133977232.

The previous prime is 5143211527. The next prime is 5143211609. The reversal of 5143211561 is 1651123415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3166875625 + 1976335936 = 56275^2 + 44456^2 .

It is a cyclic number.

It is not a de Polignac number, because 5143211561 - 2¹⁸ = 5142949417 is a prime.

It is a super-2 number, since 2×5143211561² = 52905250322408113442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5143211461) 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, 4616330 + ... + 4617443.

It is an arithmetic number, because the mean of its divisors is an integer number (1288111473).

Almost surely, 2^5143211561 is an apocalyptic number.

It is an amenable number.

5143211561 is a deficient number, since it is larger than the sum of its proper divisors (9234331).

5143211561 is an equidigital number, since it uses as much as digits as its factorization.

5143211561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9234330.

The product of its digits is 3600, while the sum is 29.

The square root of 5143211561 is about 71716.1875799320. The cubic root of 5143211561 is about 1726.1483984706.

Adding to 5143211561 its reverse (1651123415), we get a palindrome (6794334976).

The spelling of 5143211561 in words is "five billion, one hundred forty-three million, two hundred eleven thousand, five hundred sixty-one".