161330532 has 48 divisors (see below), whose sum is σ = 414759744. Its totient is φ = 48400000.

The previous prime is 161330483. The next prime is 161330551. The reversal of 161330532 is 235033161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7282 + ... + 19382.

It is an arithmetic number, because the mean of its divisors is an integer number (8640828).

Almost surely, 2^161330532 is an apocalyptic number.

161330532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161330532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207379872).

161330532 is an abundant number, since it is smaller than the sum of its proper divisors (253429212).

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

161330532 is a wasteful number, since it uses less digits than its factorization.

161330532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12220 (or 12218 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 161330532 is about 12701.5956477917. The cubic root of 161330532 is about 544.3842126096.

Adding to 161330532 its reverse (235033161), we get a palindrome (396363693).

The spelling of 161330532 in words is "one hundred sixty-one million, three hundred thirty thousand, five hundred thirty-two".