161500106 has 4 divisors (see below), whose sum is σ = 242250162. Its totient is φ = 80750052.

The previous prime is 161500081. The next prime is 161500117. The reversal of 161500106 is 601005161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 44102881 = 10835^2 + 6641^2 .

It is a super-2 number, since 2×161500106² = 52164568476022472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40375025 + ... + 40375028.

Almost surely, 2^161500106 is an apocalyptic number.

161500106 is a deficient number, since it is larger than the sum of its proper divisors (80750056).

161500106 is an equidigital number, since it uses as much as digits as its factorization.

161500106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80750055.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 161500106 is about 12708.2691976524. The cubic root of 161500106 is about 544.5748793168.

Adding to 161500106 its reverse (601005161), we get a palindrome (762505267).

The spelling of 161500106 in words is "one hundred sixty-one million, five hundred thousand, one hundred six".