42202045530521 has 4 divisors (see below), whose sum is σ = 42202065336372. Its totient is φ = 42202025724672.

The previous prime is 42202045530503. The next prime is 42202045530529. The reversal of 42202045530521 is 12503554020224.

It is a happy number.

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 15845773455625 + 26356272074896 = 3980675^2 + 5133836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42202045530521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42202045530529) 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, 6260060 + ... + 11117213.

It is an arithmetic number, because the mean of its divisors is an integer number (10550516334093).

Almost surely, 2^{42202045530521} is an apocalyptic number.

It is an amenable number.

42202045530521 is a deficient number, since it is larger than the sum of its proper divisors (19805851).

42202045530521 is a wasteful number, since it uses less digits than its factorization.

42202045530521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19805850.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 42202045530521 its reverse (12503554020224), we get a palindrome (54705599550745).

The spelling of 42202045530521 in words is "forty-two trillion, two hundred two billion, forty-five million, five hundred thirty thousand, five hundred twenty-one".