161255219 has 2 divisors, whose sum is σ = 161255220. Its totient is φ = 161255218.

The previous prime is 161255191. The next prime is 161255233. The reversal of 161255219 is 912552161.

It is a strong prime.

It is an emirp because it is prime and its reverse (912552161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161255219 - 2¹⁶ = 161189683 is a prime.

It is a super-2 number, since 2×161255219² = 52006491309475922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161255239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80627609 + 80627610.

It is an arithmetic number, because the mean of its divisors is an integer number (80627610).

Almost surely, 2^161255219 is an apocalyptic number.

161255219 is a deficient number, since it is larger than the sum of its proper divisors (1).

161255219 is an equidigital number, since it uses as much as digits as its factorization.

161255219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 161255219 is about 12698.6305954619. The cubic root of 161255219 is about 544.2994888458.

The spelling of 161255219 in words is "one hundred sixty-one million, two hundred fifty-five thousand, two hundred nineteen".