42520404231 has 24 divisors (see below), whose sum is σ = 61878076416. Its totient is φ = 28135083600.

The previous prime is 42520404229. The next prime is 42520404253. The reversal of 42520404231 is 13240402524.

42520404231 is a `hidden beast` number, since 4 + 2 + 5 + 20 + 404 + 231 = 666.

42520404231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42520404231 - 2¹ = 42520404229 is a prime.

It is a super-2 number, since 2×42520404231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42520404195 and 42520404204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520404211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1649266 + ... + 1674848.

It is an arithmetic number, because the mean of its divisors is an integer number (2578253184).

Almost surely, 2^42520404231 is an apocalyptic number.

42520404231 is a deficient number, since it is larger than the sum of its proper divisors (19357672185).

42520404231 is a wasteful number, since it uses less digits than its factorization.

42520404231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26963 (or 26960 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 42520404231 its reverse (13240402524), we get a palindrome (55760806755).

The spelling of 42520404231 in words is "forty-two billion, five hundred twenty million, four hundred four thousand, two hundred thirty-one".