42521313455 has 4 divisors (see below), whose sum is σ = 51025576152. Its totient is φ = 34017050760.

The previous prime is 42521313433. The next prime is 42521313509. The reversal of 42521313455 is 55431312524.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42521313455 - 2⁸ = 42521313199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4252131341 + ... + 4252131350.

It is an arithmetic number, because the mean of its divisors is an integer number (12756394038).

Almost surely, 2^42521313455 is an apocalyptic number.

42521313455 is a deficient number, since it is larger than the sum of its proper divisors (8504262697).

42521313455 is an equidigital number, since it uses as much as digits as its factorization.

42521313455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504262696.

The product of its digits is 72000, while the sum is 35.

Adding to 42521313455 its reverse (55431312524), we get a palindrome (97952625979).

The spelling of 42521313455 in words is "forty-two billion, five hundred twenty-one million, three hundred thirteen thousand, four hundred fifty-five".