161836224 has 224 divisors, whose sum is σ = 509625600. Its totient is φ = 44789760.

The previous prime is 161836217. The next prime is 161836231. The reversal of 161836224 is 422638161.

It is an interprime number because it is at equal distance from previous prime (161836217) and next prime (161836231).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1484682 + ... + 1484790.

Almost surely, 2^161836224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161836224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254812800).

161836224 is an abundant number, since it is smaller than the sum of its proper divisors (347789376).

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

161836224 is a wasteful number, since it uses less digits than its factorization.

161836224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 181 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 161836224 is about 12721.4867055702. The cubic root of 161836224 is about 544.9524117470.

The spelling of 161836224 in words is "one hundred sixty-one million, eight hundred thirty-six thousand, two hundred twenty-four".