42520431101 has 4 divisors (see below), whose sum is σ = 42546093852. Its totient is φ = 42494768352.

The previous prime is 42520431097. The next prime is 42520431139. The reversal of 42520431101 is 10113402524.

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 31885459225 + 10634971876 = 178565^2 + 103126^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520431101 - 2² = 42520431097 is a prime.

It is a super-2 number, since 2×42520431101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520431181) 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, 12828890 + ... + 12832203.

It is an arithmetic number, because the mean of its divisors is an integer number (10636523463).

Almost surely, 2^42520431101 is an apocalyptic number.

It is an amenable number.

42520431101 is a deficient number, since it is larger than the sum of its proper divisors (25662751).

42520431101 is a wasteful number, since it uses less digits than its factorization.

42520431101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25662750.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 42520431101 its reverse (10113402524), we get a palindrome (52633833625).

The spelling of 42520431101 in words is "forty-two billion, five hundred twenty million, four hundred thirty-one thousand, one hundred one".