42400424441 has 4 divisors (see below), whose sum is σ = 42622416384. Its totient is φ = 42178432500.

The previous prime is 42400424431. The next prime is 42400424461. The reversal of 42400424441 is 14442400424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42400424441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42400424401) 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, 110995685 + ... + 110996066.

It is an arithmetic number, because the mean of its divisors is an integer number (10655604096).

Almost surely, 2^42400424441 is an apocalyptic number.

It is an amenable number.

42400424441 is a deficient number, since it is larger than the sum of its proper divisors (221991943).

42400424441 is a wasteful number, since it uses less digits than its factorization.

42400424441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221991942.

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 42400424441 its reverse (14442400424), we get a palindrome (56842824865).

The spelling of 42400424441 in words is "forty-two billion, four hundred million, four hundred twenty-four thousand, four hundred forty-one".