5211721543 has 8 divisors (see below), whose sum is σ = 6117233312. Its totient is φ = 4346454816.

The previous prime is 5211721511. The next prime is 5211721589. The reversal of 5211721543 is 3451271125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5211721543 - 2⁵ = 5211721511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211761543) 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 7 ways as a sum of consecutive naturals, for example, 10060980 + ... + 10061497.

It is an arithmetic number, because the mean of its divisors is an integer number (764654164).

Almost surely, 2^5211721543 is an apocalyptic number.

5211721543 is a deficient number, since it is larger than the sum of its proper divisors (905511769).

5211721543 is a wasteful number, since it uses less digits than its factorization.

5211721543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122521.

The product of its digits is 8400, while the sum is 31.

The square root of 5211721543 is about 72192.2540373966. The cubic root of 5211721543 is about 1733.7789849376.

Adding to 5211721543 its reverse (3451271125), we get a palindrome (8662992668).

The spelling of 5211721543 in words is "five billion, two hundred eleven million, seven hundred twenty-one thousand, five hundred forty-three".