161432210 has 16 divisors (see below), whose sum is σ = 291000600. Its totient is φ = 64478976.

The previous prime is 161432207. The next prime is 161432213. The reversal of 161432210 is 12234161.

It is an interprime number because it is at equal distance from previous prime (161432207) and next prime (161432213).

It can be written as a sum of positive squares in 4 ways, for example, as 46963609 + 114468601 = 6853^2 + 10699^2 .

It is not an unprimeable number, because it can be changed into a prime (161432213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295 + ... + 18474.

Almost surely, 2^161432210 is an apocalyptic number.

161432210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161432210 is a deficient number, since it is larger than the sum of its proper divisors (129568390).

161432210 is a wasteful number, since it uses less digits than its factorization.

161432210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23485.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 161432210 is about 12705.5975853165. The cubic root of 161432210 is about 544.4985540033.

Adding to 161432210 its reverse (12234161), we get a palindrome (173666371).

The spelling of 161432210 in words is "one hundred sixty-one million, four hundred thirty-two thousand, two hundred ten".