161322830 has 16 divisors (see below), whose sum is σ = 293096880. Its totient is φ = 63925632.

The previous prime is 161322829. The next prime is 161322839. The reversal of 161322830 is 38223161.

It is a self number, because there is not a number n which added to its sum of digits gives 161322830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161322839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74315 + ... + 76454.

It is an arithmetic number, because the mean of its divisors is an integer number (18318555).

Almost surely, 2^161322830 is an apocalyptic number.

161322830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161322830 is a deficient number, since it is larger than the sum of its proper divisors (131774050).

161322830 is a wasteful number, since it uses less digits than its factorization.

161322830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150883.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 161322830 is about 12701.2924539198. The cubic root of 161322830 is about 544.3755494139.

Adding to 161322830 its reverse (38223161), we get a palindrome (199545991).

The spelling of 161322830 in words is "one hundred sixty-one million, three hundred twenty-two thousand, eight hundred thirty".