42532451321 has 4 divisors (see below), whose sum is σ = 42532930944. Its totient is φ = 42531971700.

The previous prime is 42532451309. The next prime is 42532451327. The reversal of 42532451321 is 12315423524.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42532451321 - 2¹⁴ = 42532434937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42532451327) 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, 63665 + ... + 298526.

It is an arithmetic number, because the mean of its divisors is an integer number (10633232736).

Almost surely, 2^42532451321 is an apocalyptic number.

It is an amenable number.

42532451321 is a deficient number, since it is larger than the sum of its proper divisors (479623).

42532451321 is a wasteful number, since it uses less digits than its factorization.

42532451321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479622.

The product of its digits is 28800, while the sum is 32.

Adding to 42532451321 its reverse (12315423524), we get a palindrome (54847874845).

The spelling of 42532451321 in words is "forty-two billion, five hundred thirty-two million, four hundred fifty-one thousand, three hundred twenty-one".