43455541 has 2 divisors, whose sum is σ = 43455542. Its totient is φ = 43455540.

The previous prime is 43455539. The next prime is 43455569. The reversal of 43455541 is 14555434.

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., 28408900 + 15046641 = 5330^2 + 3879^2 .

It is a cyclic number.

It is not a de Polignac number, because 43455541 - 2¹ = 43455539 is a prime.

Together with 43455539, 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 (43450541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21727770 + 21727771.

It is an arithmetic number, because the mean of its divisors is an integer number (21727771).

Almost surely, 2^43455541 is an apocalyptic number.

It is an amenable number.

43455541 is a deficient number, since it is larger than the sum of its proper divisors (1).

43455541 is an equidigital number, since it uses as much as digits as its factorization.

43455541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24000, while the sum is 31.

The square root of 43455541 is about 6592.0816894210. The cubic root of 43455541 is about 351.5726266620.

The spelling of 43455541 in words is "forty-three million, four hundred fifty-five thousand, five hundred forty-one".