42881000509 has 2 divisors, whose sum is σ = 42881000510. Its totient is φ = 42881000508.

The previous prime is 42881000369. The next prime is 42881000531. The reversal of 42881000509 is 90500018824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29878159609 + 13002840900 = 172853^2 + 114030^2 .

It is a cyclic number.

It is not a de Polignac number, because 42881000509 - 2¹³ = 42880992317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42881000909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21440500254 + 21440500255.

It is an arithmetic number, because the mean of its divisors is an integer number (21440500255).

Almost surely, 2^42881000509 is an apocalyptic number.

It is an amenable number.

42881000509 is a deficient number, since it is larger than the sum of its proper divisors (1).

42881000509 is an equidigital number, since it uses as much as digits as its factorization.

42881000509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 42881000509 in words is "forty-two billion, eight hundred eighty-one million, five hundred nine", and thus it is an aban number.