161343481 has 16 divisors (see below), whose sum is σ = 185721984. Its totient is φ = 138841344.

The previous prime is 161343463. The next prime is 161343493. The reversal of 161343481 is 184343161.

It is a cyclic number.

It is not a de Polignac number, because 161343481 - 2⁵ = 161343449 is a prime.

It is a super-2 number, since 2×161343481² = 52063437722394722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161343401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20236 + ... + 27058.

It is an arithmetic number, because the mean of its divisors is an integer number (11607624).

Almost surely, 2^161343481 is an apocalyptic number.

It is an amenable number.

161343481 is a deficient number, since it is larger than the sum of its proper divisors (24378503).

161343481 is a wasteful number, since it uses less digits than its factorization.

161343481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its digits is 6912, while the sum is 31.

The square root of 161343481 is about 12702.1053766689. The cubic root of 161343481 is about 544.3987770001.

The spelling of 161343481 in words is "one hundred sixty-one million, three hundred forty-three thousand, four hundred eighty-one".