6216002081 has 4 divisors (see below), whose sum is σ = 6220006212. Its totient is φ = 6211997952.

The previous prime is 6216002059. The next prime is 6216002113. The reversal of 6216002081 is 1802006126.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1802006126 = 2 ⋅901003063.

It can be written as a sum of positive squares in 2 ways, for example, as 252301456 + 5963700625 = 15884^2 + 77225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6216002081 is a prime.

It is a super-2 number, since 2×6216002081² = 77277363741992661122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6216002081.

It is not an unprimeable number, because it can be changed into a prime (6216002981) 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, 1999736 + ... + 2002841.

It is an arithmetic number, because the mean of its divisors is an integer number (1555001553).

Almost surely, 2^6216002081 is an apocalyptic number.

It is an amenable number.

6216002081 is a deficient number, since it is larger than the sum of its proper divisors (4004131).

6216002081 is a wasteful number, since it uses less digits than its factorization.

6216002081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004130.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 6216002081 is about 78841.6265750523. The cubic root of 6216002081 is about 1838.6696906983.

The spelling of 6216002081 in words is "six billion, two hundred sixteen million, two thousand, eighty-one".