42005131625 has 8 divisors (see below), whose sum is σ = 52422404424. Its totient is φ = 33604105200.

The previous prime is 42005131589. The next prime is 42005131627. The reversal of 42005131625 is 52613150024.

It can be written as a sum of positive squares in 4 ways, for example, as 34234201 + 41970897424 = 5851^2 + 204868^2 .

It is not a de Polignac number, because 42005131625 - 2²⁴ = 41988354409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42005131627) 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, 168020402 + ... + 168020651.

It is an arithmetic number, because the mean of its divisors is an integer number (6552800553).

Almost surely, 2^42005131625 is an apocalyptic number.

It is an amenable number.

42005131625 is a deficient number, since it is larger than the sum of its proper divisors (10417272799).

42005131625 is an equidigital number, since it uses as much as digits as its factorization.

42005131625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336041068 (or 336041058 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 42005131625 its reverse (52613150024), we get a palindrome (94618281649).

The spelling of 42005131625 in words is "forty-two billion, five million, one hundred thirty-one thousand, six hundred twenty-five".