42521365153 has 4 divisors (see below), whose sum is σ = 44759331760. Its totient is φ = 40283398548.

The previous prime is 42521365127. The next prime is 42521365169. The reversal of 42521365153 is 35156312524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42521365153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42521365193) 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 3 ways as a sum of consecutive naturals, for example, 1118983275 + ... + 1118983312.

It is an arithmetic number, because the mean of its divisors is an integer number (11189832940).

Almost surely, 2^42521365153 is an apocalyptic number.

It is an amenable number.

42521365153 is a deficient number, since it is larger than the sum of its proper divisors (2237966607).

42521365153 is a wasteful number, since it uses less digits than its factorization.

42521365153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237966606.

The product of its digits is 108000, while the sum is 37.

Adding to 42521365153 its reverse (35156312524), we get a palindrome (77677677677).

The spelling of 42521365153 in words is "forty-two billion, five hundred twenty-one million, three hundred sixty-five thousand, one hundred fifty-three".