402400223161 has 2 divisors, whose sum is σ = 402400223162. Its totient is φ = 402400223160.

The previous prime is 402400223131. The next prime is 402400223201. The reversal of 402400223161 is 161322004204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373986063936 + 28414159225 = 611544^2 + 168565^2 .

It is a cyclic number.

It is not a de Polignac number, because 402400223161 - 2¹³ = 402400214969 is a prime.

It is not a weakly prime, because it can be changed into another prime (402400223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201200111580 + 201200111581.

It is an arithmetic number, because the mean of its divisors is an integer number (201200111581).

Almost surely, 2^402400223161 is an apocalyptic number.

It is an amenable number.

402400223161 is a deficient number, since it is larger than the sum of its proper divisors (1).

402400223161 is an equidigital number, since it uses as much as digits as its factorization.

402400223161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 402400223161 its reverse (161322004204), we get a palindrome (563722227365).

The spelling of 402400223161 in words is "four hundred two billion, four hundred million, two hundred twenty-three thousand, one hundred sixty-one".