161345530 has 64 divisors (see below), whose sum is σ = 320112000. Its totient is φ = 58330368.

The previous prime is 161345497. The next prime is 161345533. The reversal of 161345530 is 35543161.

It is not an unprimeable number, because it can be changed into a prime (161345533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414576 + ... + 414964.

It is an arithmetic number, because the mean of its divisors is an integer number (5001750).

Almost surely, 2^161345530 is an apocalyptic number.

161345530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161345530 is a deficient number, since it is larger than the sum of its proper divisors (158766470).

161345530 is a wasteful number, since it uses less digits than its factorization.

161345530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 161345530 is about 12702.1860323332. The cubic root of 161345530 is about 544.4010815419.

Adding to 161345530 its reverse (35543161), we get a palindrome (196888691).

The spelling of 161345530 in words is "one hundred sixty-one million, three hundred forty-five thousand, five hundred thirty".