7216003081 has 24 divisors (see below), whose sum is σ = 8473303080. Its totient is φ = 6127091712.

The previous prime is 7216003063. The next prime is 7216003127. The reversal of 7216003081 is 1803006127.

It can be written as a sum of positive squares in 4 ways, for example, as 387459856 + 6828543225 = 19684^2 + 82635^2 .

It is not a de Polignac number, because 7216003081 - 2⁷ = 7216002953 is a prime.

It is a super-2 number, since 2×7216003081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7216093081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2428965 + ... + 2431933.

It is an arithmetic number, because the mean of its divisors is an integer number (353054295).

Almost surely, 2^7216003081 is an apocalyptic number.

It is an amenable number.

7216003081 is a deficient number, since it is larger than the sum of its proper divisors (1257299999).

7216003081 is a wasteful number, since it uses less digits than its factorization.

7216003081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433 (or 3426 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7216003081 is about 84947.0604612072. The cubic root of 7216003081 is about 1932.4083406646.

The spelling of 7216003081 in words is "seven billion, two hundred sixteen million, three thousand, eighty-one".