43431242 has 4 divisors (see below), whose sum is σ = 65146866. Its totient is φ = 21715620.

The previous prime is 43431233. The next prime is 43431251. The reversal of 43431242 is 24213434.

43431242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (43431233) and next prime (43431251).

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 13608721 = 5461^2 + 3689^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10857809 + ... + 10857812.

Almost surely, 2^43431242 is an apocalyptic number.

43431242 is a deficient number, since it is larger than the sum of its proper divisors (21715624).

43431242 is a wasteful number, since it uses less digits than its factorization.

43431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21715623.

The product of its digits is 2304, while the sum is 23.

The square root of 43431242 is about 6590.2383871906. The cubic root of 43431242 is about 351.5070849163.

Adding to 43431242 its reverse (24213434), we get a palindrome (67644676).

It can be divided in two parts, 434 and 31242, that multiplied together give a triangular number (13559028 = T₅₂₀₇).

The spelling of 43431242 in words is "forty-three million, four hundred thirty-one thousand, two hundred forty-two".