161355343 has 2 divisors, whose sum is σ = 161355344. Its totient is φ = 161355342.

The previous prime is 161355323. The next prime is 161355361. The reversal of 161355343 is 343553161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161355343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161355323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80677671 + 80677672.

It is an arithmetic number, because the mean of its divisors is an integer number (80677672).

Almost surely, 2^161355343 is an apocalyptic number.

161355343 is a deficient number, since it is larger than the sum of its proper divisors (1).

161355343 is an equidigital number, since it uses as much as digits as its factorization.

161355343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 161355343 is about 12702.5722985543. The cubic root of 161355343 is about 544.4121181032.

The spelling of 161355343 in words is "one hundred sixty-one million, three hundred fifty-five thousand, three hundred forty-three".