43420243401 has 16 divisors (see below), whose sum is σ = 64545841920. Its totient is φ = 28848029040.

The previous prime is 43420243379. The next prime is 43420243421. The reversal of 43420243401 is 10434202434.

It is a happy number.

It is not a de Polignac number, because 43420243401 - 2¹¹ = 43420241353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (43420243421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2736385 + ... + 2752206.

It is an arithmetic number, because the mean of its divisors is an integer number (4034115120).

Almost surely, 2^43420243401 is an apocalyptic number.

It is an amenable number.

43420243401 is a deficient number, since it is larger than the sum of its proper divisors (21125598519).

43420243401 is a wasteful number, since it uses less digits than its factorization.

43420243401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488893 (or 5488887 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 43420243401 its reverse (10434202434), we get a palindrome (53854445835).

The spelling of 43420243401 in words is "forty-three billion, four hundred twenty million, two hundred forty-three thousand, four hundred one".