5211721603 has 32 divisors (see below), whose sum is σ = 6377840640. Its totient is φ = 4197173760.

The previous prime is 5211721591. The next prime is 5211721607. The reversal of 5211721603 is 3061271125.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 5211721603 - 2¹³ = 5211713411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5211721607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 553150 + ... + 562492.

It is an arithmetic number, because the mean of its divisors is an integer number (199307520).

Almost surely, 2^5211721603 is an apocalyptic number.

5211721603 is a deficient number, since it is larger than the sum of its proper divisors (1166119037).

5211721603 is a wasteful number, since it uses less digits than its factorization.

5211721603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 5211721603 is about 72192.2544529536. The cubic root of 5211721603 is about 1733.7789915910.

Adding to 5211721603 its reverse (3061271125), we get a palindrome (8272992728).

The spelling of 5211721603 in words is "five billion, two hundred eleven million, seven hundred twenty-one thousand, six hundred three".