43444021451 has 2 divisors, whose sum is σ = 43444021452. Its totient is φ = 43444021450.

The previous prime is 43444021391. The next prime is 43444021469. The reversal of 43444021451 is 15412044434.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43444021451 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (43444021651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722010725 + 21722010726.

It is an arithmetic number, because the mean of its divisors is an integer number (21722010726).

Almost surely, 2^43444021451 is an apocalyptic number.

43444021451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43444021451 is an equidigital number, since it uses as much as digits as its factorization.

43444021451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 43444021451 its reverse (15412044434), we get a palindrome (58856065885).

The spelling of 43444021451 in words is "forty-three billion, four hundred forty-four million, twenty-one thousand, four hundred fifty-one".