43431401 has 4 divisors (see below), whose sum is σ = 46772292. Its totient is φ = 40090512.

The previous prime is 43431389. The next prime is 43431449. The reversal of 43431401 is 10413434.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14055001 + 29376400 = 3749^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 43431401 - 2¹⁴ = 43415017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43431491) 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, 1670426 + ... + 1670451.

It is an arithmetic number, because the mean of its divisors is an integer number (11693073).

Almost surely, 2^43431401 is an apocalyptic number.

It is an amenable number.

43431401 is a deficient number, since it is larger than the sum of its proper divisors (3340891).

43431401 is a wasteful number, since it uses less digits than its factorization.

43431401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340890.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 43431401 is about 6590.2504504761. The cubic root of 43431401 is about 351.5075138668.

Adding to 43431401 its reverse (10413434), we get a palindrome (53844835).

The spelling of 43431401 in words is "forty-three million, four hundred thirty-one thousand, four hundred one".