161684530 has 32 divisors (see below), whose sum is σ = 343342080. Its totient is φ = 53645760.

The previous prime is 161684527. The next prime is 161684573. The reversal of 161684530 is 35486161.

It is a happy number.

161684530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161684530² = 52283774482641800, which contains 22 as substring.

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, 35085 + ... + 39424.

It is an arithmetic number, because the mean of its divisors is an integer number (10729440).

Almost surely, 2^161684530 is an apocalyptic number.

161684530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161684530 is an abundant number, since it is smaller than the sum of its proper divisors (181657550).

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

161684530 is a wasteful number, since it uses less digits than its factorization.

161684530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74554.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 161684530 is about 12715.5231901798. The cubic root of 161684530 is about 544.7820917139.

The spelling of 161684530 in words is "one hundred sixty-one million, six hundred eighty-four thousand, five hundred thirty".