44801821 has 2 divisors, whose sum is σ = 44801822. Its totient is φ = 44801820.

The previous prime is 44801819. The next prime is 44801831. The reversal of 44801821 is 12810844.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44702596 + 99225 = 6686^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 44801821 - 2¹ = 44801819 is a prime.

Together with 44801819, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 44801821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44801831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22400910 + 22400911.

It is an arithmetic number, because the mean of its divisors is an integer number (22400911).

Almost surely, 2^44801821 is an apocalyptic number.

It is an amenable number.

44801821 is a deficient number, since it is larger than the sum of its proper divisors (1).

44801821 is an equidigital number, since it uses as much as digits as its factorization.

44801821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 44801821 is about 6693.4162428464. The cubic root of 44801821 is about 355.1664127544.

The spelling of 44801821 in words is "forty-four million, eight hundred one thousand, eight hundred twenty-one".