42440200220389 has 2 divisors, whose sum is σ = 42440200220390. Its totient is φ = 42440200220388.

The previous prime is 42440200220323. The next prime is 42440200220449. The reversal of 42440200220389 is 98302200204424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30430856517889 + 12009343702500 = 5516417^2 + 3465450^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440200220389 - 2²¹ = 42440198123237 is a prime.

It is a super-2 number, since 2×42440200220389² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440000220389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220100110194 + 21220100110195.

It is an arithmetic number, because the mean of its divisors is an integer number (21220100110195).

Almost surely, 2^{42440200220389} is an apocalyptic number.

It is an amenable number.

42440200220389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440200220389 is an equidigital number, since it uses as much as digits as its factorization.

42440200220389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 42440200220389 in words is "forty-two trillion, four hundred forty billion, two hundred million, two hundred twenty thousand, three hundred eighty-nine".