3051131981 has 2 divisors, whose sum is σ = 3051131982. Its totient is φ = 3051131980.

The previous prime is 3051131969. The next prime is 3051132011. The reversal of 3051131981 is 1891311503.

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., 2728390756 + 322741225 = 52234^2 + 17965^2 .

It is a cyclic number.

It is not a de Polignac number, because 3051131981 - 2¹⁸ = 3050869837 is a prime.

It is a super-2 number, since 2×3051131981² = 18618812730961968722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3051131581) 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 as a sum of consecutive naturals, namely, 1525565990 + 1525565991.

It is an arithmetic number, because the mean of its divisors is an integer number (1525565991).

Almost surely, 2^3051131981 is an apocalyptic number.

It is an amenable number.

3051131981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3051131981 is an equidigital number, since it uses as much as digits as its factorization.

3051131981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 3051131981 is about 55237.0526096388. The cubic root of 3051131981 is about 1450.3973514267.

The spelling of 3051131981 in words is "three billion, fifty-one million, one hundred thirty-one thousand, nine hundred eighty-one".