43557061 has 2 divisors, whose sum is σ = 43557062. Its totient is φ = 43557060.

The previous prime is 43557053. The next prime is 43557067. The reversal of 43557061 is 16075534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 2992900 = 6369^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 43557061 - 2³ = 43557053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43557067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21778530 + 21778531.

It is an arithmetic number, because the mean of its divisors is an integer number (21778531).

Almost surely, 2^43557061 is an apocalyptic number.

It is an amenable number.

43557061 is a deficient number, since it is larger than the sum of its proper divisors (1).

43557061 is an equidigital number, since it uses as much as digits as its factorization.

43557061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 43557061 is about 6599.7773447291. Note that the first 3 decimals coincide. The cubic root of 43557061 is about 351.8461928111.

The spelling of 43557061 in words is "forty-three million, five hundred fifty-seven thousand, sixty-one".