5216657621 has 16 divisors (see below), whose sum is σ = 6401514240. Its totient is φ = 4149116160.

The previous prime is 5216657573. The next prime is 5216657627. The reversal of 5216657621 is 1267566125.

It is not a de Polignac number, because 5216657621 - 2⁶ = 5216657557 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 (5216657627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300266 + ... + 317163.

It is an arithmetic number, because the mean of its divisors is an integer number (400094640).

Almost surely, 2^5216657621 is an apocalyptic number.

It is an amenable number.

5216657621 is a deficient number, since it is larger than the sum of its proper divisors (1184856619).

5216657621 is a wasteful number, since it uses less digits than its factorization.

5216657621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617524.

The product of its digits is 151200, while the sum is 41.

The square root of 5216657621 is about 72226.4329799001. The cubic root of 5216657621 is about 1734.3261725186.

The spelling of 5216657621 in words is "five billion, two hundred sixteen million, six hundred fifty-seven thousand, six hundred twenty-one".