42722145925 has 12 divisors (see below), whose sum is σ = 53974999620. Its totient is φ = 33532853120.

The previous prime is 42722145899. The next prime is 42722145929. The reversal of 42722145925 is 52954122724.

It can be written as a sum of positive squares in 6 ways, for example, as 661878529 + 42060267396 = 25727^2 + 205086^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42722145925 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42722145929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16120240 + ... + 16122889.

It is an arithmetic number, because the mean of its divisors is an integer number (4497916635).

Almost surely, 2^42722145925 is an apocalyptic number.

It is an amenable number.

42722145925 is a deficient number, since it is larger than the sum of its proper divisors (11252853695).

42722145925 is a wasteful number, since it uses less digits than its factorization.

42722145925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32243192 (or 32243187 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 42722145925 in words is "forty-two billion, seven hundred twenty-two million, one hundred forty-five thousand, nine hundred twenty-five".