42521243234 has 16 divisors (see below), whose sum is σ = 67540635648. Its totient is φ = 20007953472.

The previous prime is 42521243231. The next prime is 42521243239. The reversal of 42521243234 is 43234212524.

It is a super-2 number, since 2×42521243234² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42521243234.

It is not an unprimeable number, because it can be changed into a prime (42521243231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304847 + ... + 421869.

It is an arithmetic number, because the mean of its divisors is an integer number (4221289728).

Almost surely, 2^42521243234 is an apocalyptic number.

42521243234 is a deficient number, since it is larger than the sum of its proper divisors (25019392414).

42521243234 is a wasteful number, since it uses less digits than its factorization.

42521243234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127729.

The product of its digits is 46080, while the sum is 32.

Adding to 42521243234 its reverse (43234212524), we get a palindrome (85755455758).

The spelling of 42521243234 in words is "forty-two billion, five hundred twenty-one million, two hundred forty-three thousand, two hundred thirty-four".