161500242 has 8 divisors (see below), whose sum is σ = 323000496. Its totient is φ = 53833412.

The previous prime is 161500223. The next prime is 161500243. The reversal of 161500242 is 242005161.

It is a sphenic number, since it is the product of 3 distinct primes.

161500242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (161500243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13458348 + ... + 13458359.

It is an arithmetic number, because the mean of its divisors is an integer number (40375062).

Almost surely, 2^161500242 is an apocalyptic number.

161500242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161500242 is a wasteful number, since it uses less digits than its factorization.

161500242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26916712.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 161500242 is about 12708.2745484979. The cubic root of 161500242 is about 544.5750321798.

The spelling of 161500242 in words is "one hundred sixty-one million, five hundred thousand, two hundred forty-two".