42252312521 has 16 divisors (see below), whose sum is σ = 43621612800. Its totient is φ = 40908067200.

The previous prime is 42252312493. The next prime is 42252312523. The reversal of 42252312521 is 12521325224.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42252312521 - 2¹⁴ = 42252296137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42252312523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581845 + ... + 1608333.

It is an arithmetic number, because the mean of its divisors is an integer number (2726350800).

Almost surely, 2^42252312521 is an apocalyptic number.

It is an amenable number.

42252312521 is a deficient number, since it is larger than the sum of its proper divisors (1369300279).

42252312521 is a wasteful number, since it uses less digits than its factorization.

42252312521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26960.

The product of its digits is 9600, while the sum is 29.

Adding to 42252312521 its reverse (12521325224), we get a palindrome (54773637745).

The spelling of 42252312521 in words is "forty-two billion, two hundred fifty-two million, three hundred twelve thousand, five hundred twenty-one".