43550121 has 8 divisors (see below), whose sum is σ = 58862560. Its totient is φ = 28635552.

The previous prime is 43550119. The next prime is 43550123. The reversal of 43550121 is 12105534.

It is an interprime number because it is at equal distance from previous prime (43550119) and next prime (43550123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43550121 - 2¹ = 43550119 is a prime.

It is a super-2 number, since 2×43550121² = 3793226078229282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43550123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99211 + ... + 99648.

It is an arithmetic number, because the mean of its divisors is an integer number (7357820).

Almost surely, 2^43550121 is an apocalyptic number.

It is an amenable number.

43550121 is a deficient number, since it is larger than the sum of its proper divisors (15312439).

43550121 is a wasteful number, since it uses less digits than its factorization.

43550121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198935.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 43550121 is about 6599.2515484712. The cubic root of 43550121 is about 351.8275051233.

Adding to 43550121 its reverse (12105534), we get a palindrome (55655655).

The spelling of 43550121 in words is "forty-three million, five hundred fifty thousand, one hundred twenty-one".