44351561 has 2 divisors, whose sum is σ = 44351562. Its totient is φ = 44351560.

The previous prime is 44351557. The next prime is 44351563. The reversal of 44351561 is 16515344.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37945600 + 6405961 = 6160^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 44351561 - 2² = 44351557 is a prime.

Together with 44351563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44351563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22175780 + 22175781.

It is an arithmetic number, because the mean of its divisors is an integer number (22175781).

Almost surely, 2^44351561 is an apocalyptic number.

It is an amenable number.

44351561 is a deficient number, since it is larger than the sum of its proper divisors (1).

44351561 is an equidigital number, since it uses as much as digits as its factorization.

44351561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 44351561 is about 6659.6967648685. The cubic root of 44351561 is about 353.9725924923.

The spelling of 44351561 in words is "forty-four million, three hundred fifty-one thousand, five hundred sixty-one".