43518061 has 2 divisors, whose sum is σ = 43518062. Its totient is φ = 43518060.

The previous prime is 43518043. The next prime is 43518073. The reversal of 43518061 is 16081534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35928036 + 7590025 = 5994^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 43518061 - 2⁹ = 43517549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43518161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21759030 + 21759031.

It is an arithmetic number, because the mean of its divisors is an integer number (21759031).

Almost surely, 2^43518061 is an apocalyptic number.

It is an amenable number.

43518061 is a deficient number, since it is larger than the sum of its proper divisors (1).

43518061 is an equidigital number, since it uses as much as digits as its factorization.

43518061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 43518061 is about 6596.8220379210. The cubic root of 43518061 is about 351.7411497657.

Adding to 43518061 its reverse (16081534), we get a palindrome (59599595).

It can be divided in two parts, 435 and 18061, that added together give a square (18496 = 136²).

The spelling of 43518061 in words is "forty-three million, five hundred eighteen thousand, sixty-one".