42532250221 has 4 divisors (see below), whose sum is σ = 42542171100. Its totient is φ = 42522329344.

The previous prime is 42532250219. The next prime is 42532250231. The reversal of 42532250221 is 12205223524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16695224100 + 25837026121 = 129210^2 + 160739^2 .

It is a cyclic number.

It is not a de Polignac number, because 42532250221 - 2¹ = 42532250219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42532250221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42532250231) 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, 4954006 + ... + 4962583.

It is an arithmetic number, because the mean of its divisors is an integer number (10635542775).

Almost surely, 2^42532250221 is an apocalyptic number.

It is an amenable number.

42532250221 is a deficient number, since it is larger than the sum of its proper divisors (9920879).

42532250221 is an equidigital number, since it uses as much as digits as its factorization.

42532250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920878.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 42532250221 its reverse (12205223524), we get a palindrome (54737473745).

The spelling of 42532250221 in words is "forty-two billion, five hundred thirty-two million, two hundred fifty thousand, two hundred twenty-one".