42404243401 has 4 divisors (see below), whose sum is σ = 45666108292. Its totient is φ = 39142378512.

The previous prime is 42404243393. The next prime is 42404243423. The reversal of 42404243401 is 10434240424.

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 6928897600 + 35475345801 = 83240^2 + 188349^2 .

It is a cyclic number.

It is not a de Polignac number, because 42404243401 - 2³ = 42404243393 is a prime.

It is a super-2 number, since 2×42404243401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42404243401.

It is not an unprimeable number, because it can be changed into a prime (42404243201) 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, 1630932426 + ... + 1630932451.

It is an arithmetic number, because the mean of its divisors is an integer number (11416527073).

Almost surely, 2^42404243401 is an apocalyptic number.

It is an amenable number.

42404243401 is a deficient number, since it is larger than the sum of its proper divisors (3261864891).

42404243401 is a wasteful number, since it uses less digits than its factorization.

42404243401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261864890.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 42404243401 its reverse (10434240424), we get a palindrome (52838483825).

The spelling of 42404243401 in words is "forty-two billion, four hundred four million, two hundred forty-three thousand, four hundred one".