43550397 has 12 divisors (see below), whose sum is σ = 68625024. Its totient is φ = 26394120.

The previous prime is 43550393. The next prime is 43550407. The reversal of 43550397 is 79305534.

43550397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43550397 - 2² = 43550393 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43550393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219853 + ... + 220050.

It is an arithmetic number, because the mean of its divisors is an integer number (5718752).

Almost surely, 2^43550397 is an apocalyptic number.

It is an amenable number.

43550397 is a deficient number, since it is larger than the sum of its proper divisors (25074627).

43550397 is a wasteful number, since it uses less digits than its factorization.

43550397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439920 (or 439917 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 43550397 is about 6599.2724599004. The cubic root of 43550397 is about 351.8282483603.

It can be divided in two parts, 435503 and 97, that added together give a square (435600 = 660²).

The spelling of 43550397 in words is "forty-three million, five hundred fifty thousand, three hundred ninety-seven".