161216023 has 2 divisors, whose sum is σ = 161216024. Its totient is φ = 161216022.

The previous prime is 161216009. The next prime is 161216053. The reversal of 161216023 is 320612161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161216023 - 2⁵ = 161215991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161215985 and 161216003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161216053) 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, 80608011 + 80608012.

It is an arithmetic number, because the mean of its divisors is an integer number (80608012).

Almost surely, 2^161216023 is an apocalyptic number.

161216023 is a deficient number, since it is larger than the sum of its proper divisors (1).

161216023 is an equidigital number, since it uses as much as digits as its factorization.

161216023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 161216023 is about 12697.0871856501. The cubic root of 161216023 is about 544.2553846577.

Adding to 161216023 its reverse (320612161), we get a palindrome (481828184).

The spelling of 161216023 in words is "one hundred sixty-one million, two hundred sixteen thousand, twenty-three".