43474466447521 has 2 divisors, whose sum is σ = 43474466447522. Its totient is φ = 43474466447520.

The previous prime is 43474466447371. The next prime is 43474466447567. The reversal of 43474466447521 is 12574466447434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40680019291921 + 2794447155600 = 6378089^2 + 1671660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43474466447521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43474466447521.

It is not a weakly prime, because it can be changed into another prime (43474466447591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21737233223760 + 21737233223761.

It is an arithmetic number, because the mean of its divisors is an integer number (21737233223761).

Almost surely, 2^{43474466447521} is an apocalyptic number.

It is an amenable number.

43474466447521 is a deficient number, since it is larger than the sum of its proper divisors (1).

43474466447521 is an equidigital number, since it uses as much as digits as its factorization.

43474466447521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216760320, while the sum is 61.

The spelling of 43474466447521 in words is "forty-three trillion, four hundred seventy-four billion, four hundred sixty-six million, four hundred forty-seven thousand, five hundred twenty-one".