3081621481 has 2 divisors, whose sum is σ = 3081621482. Its totient is φ = 3081621480.

The previous prime is 3081621469. The next prime is 3081621523. The reversal of 3081621481 is 1841261803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907942400 + 1173679081 = 43680^2 + 34259^2 .

It is a cyclic number.

It is not a de Polignac number, because 3081621481 - 2⁷ = 3081621353 is a prime.

It is a super-2 number, since 2×3081621481² = 18992781904321266722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3081621181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540810740 + 1540810741.

It is an arithmetic number, because the mean of its divisors is an integer number (1540810741).

Almost surely, 2^3081621481 is an apocalyptic number.

It is an amenable number.

3081621481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3081621481 is an equidigital number, since it uses as much as digits as its factorization.

3081621481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 3081621481 is about 55512.3543096489. The cubic root of 3081621481 is about 1455.2125480795.

The spelling of 3081621481 in words is "three billion, eighty-one million, six hundred twenty-one thousand, four hundred eighty-one".