161306343 has 32 divisors (see below), whose sum is σ = 263278080. Its totient is φ = 96793920.

The previous prime is 161306329. The next prime is 161306351. The reversal of 161306343 is 343603161.

161306343 is a `hidden beast` number, since 1 + 613 + 0 + 6 + 3 + 43 = 666.

It is not a de Polignac number, because 161306343 - 2⁶ = 161306279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161306443) 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 in 31 ways as a sum of consecutive naturals, for example, 27955 + ... + 33227.

It is an arithmetic number, because the mean of its divisors is an integer number (8227440).

Almost surely, 2^161306343 is an apocalyptic number.

161306343 is a deficient number, since it is larger than the sum of its proper divisors (101971737).

161306343 is a wasteful number, since it uses less digits than its factorization.

161306343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396 (or 5390 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 161306343 is about 12700.6434088986. The cubic root of 161306343 is about 544.3570039391.

The spelling of 161306343 in words is "one hundred sixty-one million, three hundred six thousand, three hundred forty-three".