3081513021 has 16 divisors (see below), whose sum is σ = 4315729920. Its totient is φ = 1952002800.

The previous prime is 3081512989. The next prime is 3081513037. The reversal of 3081513021 is 1203151803.

It is not a de Polignac number, because 3081513021 - 2⁵ = 3081512989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3081512982 and 3081513000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081513221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137461 + ... + 158298.

It is an arithmetic number, because the mean of its divisors is an integer number (269733120).

Almost surely, 2^3081513021 is an apocalyptic number.

It is an amenable number.

3081513021 is a deficient number, since it is larger than the sum of its proper divisors (1234216899).

3081513021 is a wasteful number, since it uses less digits than its factorization.

3081513021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295936.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 3081513021 is about 55511.3774013940. The cubic root of 3081513021 is about 1455.1954754436.

Adding to 3081513021 its reverse (1203151803), we get a palindrome (4284664824).

The spelling of 3081513021 in words is "three billion, eighty-one million, five hundred thirteen thousand, twenty-one".