42423531455531 has 8 divisors (see below), whose sum is σ = 43226571288384. Its totient is φ = 41620587765120.

The previous prime is 42423531455521. The next prime is 42423531455533. The reversal of 42423531455531 is 13555413532424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42423531455531 is a prime.

It is a super-4 number, since 4×42423531455531⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42423531455533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23144435 + ... + 24910076.

It is an arithmetic number, because the mean of its divisors is an integer number (5403321411048).

Almost surely, 2^{42423531455531} is an apocalyptic number.

42423531455531 is a deficient number, since it is larger than the sum of its proper divisors (803039832853).

42423531455531 is a wasteful number, since it uses less digits than its factorization.

42423531455531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48071221.

The product of its digits is 4320000, while the sum is 47.

Adding to 42423531455531 its reverse (13555413532424), we get a palindrome (55978944987955).

The spelling of 42423531455531 in words is "forty-two trillion, four hundred twenty-three billion, five hundred thirty-one million, four hundred fifty-five thousand, five hundred thirty-one".