43550137 has 2 divisors, whose sum is σ = 43550138. Its totient is φ = 43550136.

The previous prime is 43550131. The next prime is 43550149. The reversal of 43550137 is 73105534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36048016 + 7502121 = 6004^2 + 2739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43550137 is a prime.

It is a super-2 number, since 2×43550137² = 3793228865437538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43550131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21775068 + 21775069.

It is an arithmetic number, because the mean of its divisors is an integer number (21775069).

Almost surely, 2^43550137 is an apocalyptic number.

It is an amenable number.

43550137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43550137 is an equidigital number, since it uses as much as digits as its factorization.

43550137 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 43550137 is about 6599.2527607298. The cubic root of 43550137 is about 351.8275482096.

The spelling of 43550137 in words is "forty-three million, five hundred fifty thousand, one hundred thirty-seven".