43420431 has 8 divisors (see below), whose sum is σ = 61299504. Its totient is φ = 27244160.

The previous prime is 43420427. The next prime is 43420439. The reversal of 43420431 is 13402434.

43420431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 43420431 - 2² = 43420427 is a prime.

It is a super-2 number, since 2×43420431² = 3770667656451522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43420398 and 43420407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420439) 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 7 ways as a sum of consecutive naturals, for example, 425640 + ... + 425741.

It is an arithmetic number, because the mean of its divisors is an integer number (7662438).

Almost surely, 2^43420431 is an apocalyptic number.

43420431 is a deficient number, since it is larger than the sum of its proper divisors (17879073).

43420431 is a wasteful number, since it uses less digits than its factorization.

43420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851401.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 43420431 is about 6589.4181078453. The cubic root of 43420431 is about 351.4779165245.

Adding to 43420431 its reverse (13402434), we get a palindrome (56822865).

The spelling of 43420431 in words is "forty-three million, four hundred twenty thousand, four hundred thirty-one".