161021230 has 16 divisors (see below), whose sum is σ = 290039904. Its totient is φ = 64363680.

The previous prime is 161021221. The next prime is 161021323. The reversal of 161021230 is 32120161.

It is a congruent number.

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, 12175 + ... + 21685.

It is an arithmetic number, because the mean of its divisors is an integer number (18127494).

Almost surely, 2^161021230 is an apocalyptic number.

161021230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161021230 is a deficient number, since it is larger than the sum of its proper divisors (129018674).

161021230 is a wasteful number, since it uses less digits than its factorization.

161021230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 161021230 is about 12689.4140920690. The cubic root of 161021230 is about 544.0360932475.

Adding to 161021230 its reverse (32120161), we get a palindrome (193141391).

The spelling of 161021230 in words is "one hundred sixty-one million, twenty-one thousand, two hundred thirty".