161022313 has 2 divisors, whose sum is σ = 161022314. Its totient is φ = 161022312.

The previous prime is 161022299. The next prime is 161022343. The reversal of 161022313 is 313220161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96589584 + 64432729 = 9828^2 + 8027^2 .

It is an emirp because it is prime and its reverse (313220161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161022313 is a prime.

It is not a weakly prime, because it can be changed into another prime (161022343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80511156 + 80511157.

It is an arithmetic number, because the mean of its divisors is an integer number (80511157).

Almost surely, 2^161022313 is an apocalyptic number.

It is an amenable number.

161022313 is a deficient number, since it is larger than the sum of its proper divisors (1).

161022313 is an equidigital number, since it uses as much as digits as its factorization.

161022313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 161022313 is about 12689.4567653623. The cubic root of 161022313 is about 544.0373129413.

Adding to 161022313 its reverse (313220161), we get a palindrome (474242474).

The spelling of 161022313 in words is "one hundred sixty-one million, twenty-two thousand, three hundred thirteen".