44331521987 has 2 divisors, whose sum is σ = 44331521988. Its totient is φ = 44331521986.

The previous prime is 44331521977. The next prime is 44331522073. The reversal of 44331521987 is 78912513344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 44331521987 - 2¹⁶ = 44331456451 is a prime.

It is not a weakly prime, because it can be changed into another prime (44331521977) 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, 22165760993 + 22165760994.

It is an arithmetic number, because the mean of its divisors is an integer number (22165760994).

Almost surely, 2^44331521987 is an apocalyptic number.

44331521987 is a deficient number, since it is larger than the sum of its proper divisors (1).

44331521987 is an equidigital number, since it uses as much as digits as its factorization.

44331521987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The spelling of 44331521987 in words is "forty-four billion, three hundred thirty-one million, five hundred twenty-one thousand, nine hundred eighty-seven".