7331000081 has 2 divisors, whose sum is σ = 7331000082. Its totient is φ = 7331000080.

The previous prime is 7331000077. The next prime is 7331000141. The reversal of 7331000081 is 1800001337.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4430100481 + 2900899600 = 66559^2 + 53860^2 .

It is a cyclic number.

It is not a de Polignac number, because 7331000081 - 2² = 7331000077 is a prime.

It is a super-2 number, since 2×7331000081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7331000581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3665500040 + 3665500041.

It is an arithmetic number, because the mean of its divisors is an integer number (3665500041).

Almost surely, 2^7331000081 is an apocalyptic number.

It is an amenable number.

7331000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7331000081 is an equidigital number, since it uses as much as digits as its factorization.

7331000081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 7331000081 is about 85621.2595153797. The cubic root of 7331000081 is about 1942.6194891236.

The spelling of 7331000081 in words is "seven billion, three hundred thirty-one million, eighty-one", and thus it is an aban number.