161055233 has 2 divisors, whose sum is σ = 161055234. Its totient is φ = 161055232.

The previous prime is 161055227. The next prime is 161055259. The reversal of 161055233 is 332550161.

It is an a-pointer prime, because the next prime (161055259) can be obtained adding 161055233 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118113424 + 42941809 = 10868^2 + 6553^2 .

It is an emirp because it is prime and its reverse (332550161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161055233 - 2⁴ = 161055217 is a prime.

It is equal to p_9030446 and since 161055233 and 9030446 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (161055133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80527616 + 80527617.

It is an arithmetic number, because the mean of its divisors is an integer number (80527617).

Almost surely, 2^161055233 is an apocalyptic number.

It is an amenable number.

161055233 is a deficient number, since it is larger than the sum of its proper divisors (1).

161055233 is an equidigital number, since it uses as much as digits as its factorization.

161055233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 161055233 is about 12690.7538389175. The cubic root of 161055233 is about 544.0743854183.

The spelling of 161055233 in words is "one hundred sixty-one million, fifty-five thousand, two hundred thirty-three".