42513831523 has 8 divisors (see below), whose sum is σ = 45089805600. Its totient is φ = 39946208640.

The previous prime is 42513831491. The next prime is 42513831617. The reversal of 42513831523 is 32513831524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42513831523 - 2⁵ = 42513831491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42543831523) 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 7 ways as a sum of consecutive naturals, for example, 2077308 + ... + 2097673.

It is an arithmetic number, because the mean of its divisors is an integer number (5636225700).

Almost surely, 2^42513831523 is an apocalyptic number.

42513831523 is a deficient number, since it is larger than the sum of its proper divisors (2575974077).

42513831523 is a wasteful number, since it uses less digits than its factorization.

42513831523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175597.

The product of its digits is 86400, while the sum is 37.

Subtracting from 42513831523 its reverse (32513831524), we obtain a palindrome (9999999999).

The spelling of 42513831523 in words is "forty-two billion, five hundred thirteen million, eight hundred thirty-one thousand, five hundred twenty-three".