45442213021 has 2 divisors, whose sum is σ = 45442213022. Its totient is φ = 45442213020.

The previous prime is 45442212997. The next prime is 45442213057. The reversal of 45442213021 is 12031224454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37379968921 + 8062244100 = 193339^2 + 89790^2 .

It is a cyclic number.

It is not a de Polignac number, because 45442213021 - 2²⁹ = 44905342109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45442213121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22721106510 + 22721106511.

It is an arithmetic number, because the mean of its divisors is an integer number (22721106511).

Almost surely, 2^45442213021 is an apocalyptic number.

It is an amenable number.

45442213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45442213021 is an equidigital number, since it uses as much as digits as its factorization.

45442213021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 45442213021 its reverse (12031224454), we get a palindrome (57473437475).

The spelling of 45442213021 in words is "forty-five billion, four hundred forty-two million, two hundred thirteen thousand, twenty-one".