43431427 has 4 divisors (see below), whose sum is σ = 46772320. Its totient is φ = 40090536.

The previous prime is 43431389. The next prime is 43431449. The reversal of 43431427 is 72413434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72413434 = 2 ⋅36206717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43431427 is a prime.

It is a super-3 number, since 3×43431427³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43431395 and 43431404.

It is not an unprimeable number, because it can be changed into a prime (43431497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670427 + ... + 1670452.

It is an arithmetic number, because the mean of its divisors is an integer number (11693080).

Almost surely, 2^43431427 is an apocalyptic number.

43431427 is a deficient number, since it is larger than the sum of its proper divisors (3340893).

43431427 is a wasteful number, since it uses less digits than its factorization.

43431427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340892.

The product of its digits is 8064, while the sum is 28.

The square root of 43431427 is about 6590.2524230867. The cubic root of 43431427 is about 351.5075840096.

The spelling of 43431427 in words is "forty-three million, four hundred thirty-one thousand, four hundred twenty-seven".