5216051661 has 32 divisors (see below), whose sum is σ = 7385579520. Its totient is φ = 3269246400.

The previous prime is 5216051651. The next prime is 5216051677. The reversal of 5216051661 is 1661506125.

It is not a de Polignac number, because 5216051661 - 2²⁶ = 5148942797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5216051641) 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, 760395 + ... + 767223.

It is an arithmetic number, because the mean of its divisors is an integer number (230799360).

Almost surely, 2^5216051661 is an apocalyptic number.

It is an amenable number.

5216051661 is a deficient number, since it is larger than the sum of its proper divisors (2169527859).

5216051661 is a wasteful number, since it uses less digits than its factorization.

5216051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 5216051661 is about 72222.2379949555. The cubic root of 5216051661 is about 1734.2590175791.

Adding to 5216051661 its reverse (1661506125), we get a palindrome (6877557786).

The spelling of 5216051661 in words is "five billion, two hundred sixteen million, fifty-one thousand, six hundred sixty-one".