45211982821 has 2 divisors, whose sum is σ = 45211982822. Its totient is φ = 45211982820.

The previous prime is 45211982791. The next prime is 45211982833. The reversal of 45211982821 is 12828911254.

45211982821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34712906596 + 10499076225 = 186314^2 + 102465^2 .

It is a cyclic number.

It is not a de Polignac number, because 45211982821 - 2¹⁷ = 45211851749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45211982021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22605991410 + 22605991411.

It is an arithmetic number, because the mean of its divisors is an integer number (22605991411).

Almost surely, 2^45211982821 is an apocalyptic number.

It is an amenable number.

45211982821 is a deficient number, since it is larger than the sum of its proper divisors (1).

45211982821 is an equidigital number, since it uses as much as digits as its factorization.

45211982821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 43.

The spelling of 45211982821 in words is "forty-five billion, two hundred eleven million, nine hundred eighty-two thousand, eight hundred twenty-one".