402331217 has 2 divisors, whose sum is σ = 402331218. Its totient is φ = 402331216.

The previous prime is 402331201. The next prime is 402331243. The reversal of 402331217 is 712133204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266864896 + 135466321 = 16336^2 + 11639^2 .

It is a cyclic number.

It is not a de Polignac number, because 402331217 - 2⁴ = 402331201 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 402331192 and 402331201.

It is not a weakly prime, because it can be changed into another prime (402331247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201165608 + 201165609.

It is an arithmetic number, because the mean of its divisors is an integer number (201165609).

Almost surely, 2^402331217 is an apocalyptic number.

It is an amenable number.

402331217 is a deficient number, since it is larger than the sum of its proper divisors (1).

402331217 is an equidigital number, since it uses as much as digits as its factorization.

402331217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 402331217 is about 20058.1957563486. The cubic root of 402331217 is about 738.2349074595.

The spelling of 402331217 in words is "four hundred two million, three hundred thirty-one thousand, two hundred seventeen".