161224308 has 54 divisors (see below), whose sum is σ = 474081426. Its totient is φ = 46063584.

The previous prime is 161224307. The next prime is 161224309. The reversal of 161224308 is 803422161.

161224308 is a `hidden beast` number, since 1 + 612 + 2 + 43 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (161224307) and next prime (161224309).

It can be written as a sum of positive squares in only one way, i.e., 129549924 + 31674384 = 11382^2 + 5628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161224307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43935 + ... + 47462.

Almost surely, 2^161224308 is an apocalyptic number.

161224308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161224308 is an abundant number, since it is smaller than the sum of its proper divisors (312857118).

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

161224308 is a wasteful number, since it uses less digits than its factorization.

161224308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91421 (or 91409 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161224308 is about 12697.4134373895. The cubic root of 161224308 is about 544.2647077149.

Adding to 161224308 its reverse (803422161), we get a palindrome (964646469).

The spelling of 161224308 in words is "one hundred sixty-one million, two hundred twenty-four thousand, three hundred eight".