161613330 has 16 divisors (see below), whose sum is σ = 387872064. Its totient is φ = 43096880.

The previous prime is 161613311. The next prime is 161613343. The reversal of 161613330 is 33316161.

It is a super-2 number, since 2×161613330² = 52237736867377800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161613330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2693526 + ... + 2693585.

It is an arithmetic number, because the mean of its divisors is an integer number (24242004).

Almost surely, 2^161613330 is an apocalyptic number.

161613330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161613330 is an abundant number, since it is smaller than the sum of its proper divisors (226258734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161613330 is a wasteful number, since it uses less digits than its factorization.

161613330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387121.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 161613330 is about 12712.7231543836. The cubic root of 161613330 is about 544.7021125512.

Adding to 161613330 its reverse (33316161), we get a palindrome (194929491).

It can be divided in two parts, 16161 and 3330, that added together give a palindrome (19491).

The spelling of 161613330 in words is "one hundred sixty-one million, six hundred thirteen thousand, three hundred thirty".