3133543981 has 2 divisors, whose sum is σ = 3133543982. Its totient is φ = 3133543980.

The previous prime is 3133543979. The next prime is 3133544017. The reversal of 3133543981 is 1893453313.

3133543981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2187058756 + 946485225 = 46766^2 + 30765^2 .

It is a cyclic number.

It is not a de Polignac number, because 3133543981 - 2¹ = 3133543979 is a prime.

It is a super-2 number, since 2×3133543981² = 19638195761722656722, which contains 22 as substring.

Together with 3133543979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3133543961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1566771990 + 1566771991.

It is an arithmetic number, because the mean of its divisors is an integer number (1566771991).

Almost surely, 2^3133543981 is an apocalyptic number.

It is an amenable number.

3133543981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3133543981 is an equidigital number, since it uses as much as digits as its factorization.

3133543981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 3133543981 is about 55978.0669637672. The cubic root of 3133543981 is about 1463.3400700819.

The spelling of 3133543981 in words is "three billion, one hundred thirty-three million, five hundred forty-three thousand, nine hundred eighty-one".