161103538 has 16 divisors (see below), whose sum is σ = 244506240. Its totient is φ = 79606800.

The previous prime is 161103533. The next prime is 161103539. The reversal of 161103538 is 835301161.

It is a super-2 number, since 2×161103538² = 51908699912234888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161103533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69868 + ... + 72136.

It is an arithmetic number, because the mean of its divisors is an integer number (15281640).

Almost surely, 2^161103538 is an apocalyptic number.

161103538 is a deficient number, since it is larger than the sum of its proper divisors (83402702).

161103538 is a wasteful number, since it uses less digits than its factorization.

161103538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161103538 is about 12692.6568534724. The cubic root of 161103538 is about 544.1287743912.

Adding to 161103538 its reverse (835301161), we get a palindrome (996404699).

The spelling of 161103538 in words is "one hundred sixty-one million, one hundred three thousand, five hundred thirty-eight".