161233224 has 32 divisors (see below), whose sum is σ = 404784000. Its totient is φ = 53517632.

The previous prime is 161233217. The next prime is 161233249. The reversal of 161233224 is 422332161.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 161233194 and 161233203.

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, 8319 + ... + 19790.

It is an arithmetic number, because the mean of its divisors is an integer number (12649500).

Almost surely, 2^161233224 is an apocalyptic number.

It is an amenable number.

161233224 is an abundant number, since it is smaller than the sum of its proper divisors (243550776).

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

161233224 is a wasteful number, since it uses less digits than its factorization.

161233224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28357 (or 28353 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 161233224 is about 12697.7645276639. The cubic root of 161233224 is about 544.2747404755.

Adding to 161233224 its reverse (422332161), we get a palindrome (583565385).

The spelling of 161233224 in words is "one hundred sixty-one million, two hundred thirty-three thousand, two hundred twenty-four".