43301041981 has 2 divisors, whose sum is σ = 43301041982. Its totient is φ = 43301041980.

The previous prime is 43301041963. The next prime is 43301042041. The reversal of 43301041981 is 18914010334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42795196900 + 505845081 = 206870^2 + 22491^2 .

It is a cyclic number.

It is not a de Polignac number, because 43301041981 - 2¹¹ = 43301039933 is a prime.

It is a super-2 number, since 2×43301041981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43301041081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21650520990 + 21650520991.

It is an arithmetic number, because the mean of its divisors is an integer number (21650520991).

Almost surely, 2^43301041981 is an apocalyptic number.

It is an amenable number.

43301041981 is a deficient number, since it is larger than the sum of its proper divisors (1).

43301041981 is an equidigital number, since it uses as much as digits as its factorization.

43301041981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 43301041981 in words is "forty-three billion, three hundred one million, forty-one thousand, nine hundred eighty-one".