42520221345 has 32 divisors (see below), whose sum is σ = 77780650752. Its totient is φ = 19430468352.

The previous prime is 42520221287. The next prime is 42520221361. The reversal of 42520221345 is 54312202524.

42520221345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42520221345 - 2⁸ = 42520221089 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207579 + ... + 357951.

It is an arithmetic number, because the mean of its divisors is an integer number (2430645336).

Almost surely, 2^42520221345 is an apocalyptic number.

It is an amenable number.

42520221345 is a deficient number, since it is larger than the sum of its proper divisors (35260429407).

42520221345 is a wasteful number, since it uses less digits than its factorization.

42520221345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153081.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 42520221345 its reverse (54312202524), we get a palindrome (96832423869).

The spelling of 42520221345 in words is "forty-two billion, five hundred twenty million, two hundred twenty-one thousand, three hundred forty-five".