43013557 has 2 divisors, whose sum is σ = 43013558. Its totient is φ = 43013556.

The previous prime is 43013543. The next prime is 43013567. The reversal of 43013557 is 75531034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 1874161 = 6414^2 + 1369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43013557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43013527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21506778 + 21506779.

It is an arithmetic number, because the mean of its divisors is an integer number (21506779).

Almost surely, 2^43013557 is an apocalyptic number.

It is an amenable number.

43013557 is a deficient number, since it is larger than the sum of its proper divisors (1).

43013557 is an equidigital number, since it uses as much as digits as its factorization.

43013557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 43013557 is about 6558.4721543969. The cubic root of 43013557 is about 350.3766204394.

The spelling of 43013557 in words is "forty-three million, thirteen thousand, five hundred fifty-seven".