402440044217 has 2 divisors, whose sum is σ = 402440044218. Its totient is φ = 402440044216.

The previous prime is 402440044169. The next prime is 402440044249. The reversal of 402440044217 is 712440044204.

It is an a-pointer prime, because the next prime (402440044249) can be obtained adding 402440044217 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331947670201 + 70492374016 = 576149^2 + 265504^2 .

It is a cyclic number.

It is not a de Polignac number, because 402440044217 - 2⁸ = 402440043961 is a prime.

It is not a weakly prime, because it can be changed into another prime (402440049217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201220022108 + 201220022109.

It is an arithmetic number, because the mean of its divisors is an integer number (201220022109).

Almost surely, 2^402440044217 is an apocalyptic number.

It is an amenable number.

402440044217 is a deficient number, since it is larger than the sum of its proper divisors (1).

402440044217 is an equidigital number, since it uses as much as digits as its factorization.

402440044217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 32.

The spelling of 402440044217 in words is "four hundred two billion, four hundred forty million, forty-four thousand, two hundred seventeen".