43425916321 has 2 divisors, whose sum is σ = 43425916322. Its totient is φ = 43425916320.

The previous prime is 43425916243. The next prime is 43425916361. The reversal of 43425916321 is 12361952434.

It is an a-pointer prime, because the next prime (43425916361) can be obtained adding 43425916321 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29041272225 + 14384644096 = 170415^2 + 119936^2 .

It is a cyclic number.

It is not a de Polignac number, because 43425916321 - 2⁹ = 43425915809 is a prime.

It is not a weakly prime, because it can be changed into another prime (43425916361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21712958160 + 21712958161.

It is an arithmetic number, because the mean of its divisors is an integer number (21712958161).

Almost surely, 2^43425916321 is an apocalyptic number.

It is an amenable number.

43425916321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43425916321 is an equidigital number, since it uses as much as digits as its factorization.

43425916321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The spelling of 43425916321 in words is "forty-three billion, four hundred twenty-five million, nine hundred sixteen thousand, three hundred twenty-one".