161103011 has 4 divisors (see below), whose sum is σ = 161455992. Its totient is φ = 160750032.

The previous prime is 161102989. The next prime is 161103023. The reversal of 161103011 is 110301161.

161103011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 161103011 - 2⁶ = 161102947 is a prime.

It is a super-2 number, since 2×161103011² = 51908360306532242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161103211) 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, 175805 + ... + 176718.

It is an arithmetic number, because the mean of its divisors is an integer number (40363998).

Almost surely, 2^161103011 is an apocalyptic number.

161103011 is a deficient number, since it is larger than the sum of its proper divisors (352981).

161103011 is an equidigital number, since it uses as much as digits as its factorization.

161103011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352980.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 161103011 is about 12692.6360934205. The cubic root of 161103011 is about 544.1281810746.

Adding to 161103011 its reverse (110301161), we get a palindrome (271404172).

The spelling of 161103011 in words is "one hundred sixty-one million, one hundred three thousand, eleven".