43761481 has 2 divisors, whose sum is σ = 43761482. Its totient is φ = 43761480.

The previous prime is 43761407. The next prime is 43761511. The reversal of 43761481 is 18416734.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 15085456 = 5355^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 43761481 - 2⁷ = 43761353 is a prime.

It is a super-2 number, since 2×43761481² = 3830134438626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43701481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21880740 + 21880741.

It is an arithmetic number, because the mean of its divisors is an integer number (21880741).

Almost surely, 2^43761481 is an apocalyptic number.

It is an amenable number.

43761481 is a deficient number, since it is larger than the sum of its proper divisors (1).

43761481 is an equidigital number, since it uses as much as digits as its factorization.

43761481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 43761481 is about 6615.2461027538. The cubic root of 43761481 is about 352.3957567786.

The spelling of 43761481 in words is "forty-three million, seven hundred sixty-one thousand, four hundred eighty-one".