161455103 has 16 divisors (see below), whose sum is σ = 180637920. Its totient is φ = 143410176.

The previous prime is 161455081. The next prime is 161455109. The reversal of 161455103 is 301554161.

It is not a de Polignac number, because 161455103 - 2²⁰ = 160406527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161455109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100301 + ... + 101897.

It is an arithmetic number, because the mean of its divisors is an integer number (11289870).

Almost surely, 2^161455103 is an apocalyptic number.

161455103 is a deficient number, since it is larger than the sum of its proper divisors (19182817).

161455103 is a wasteful number, since it uses less digits than its factorization.

161455103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 161455103 is about 12706.4984555148. The cubic root of 161455103 is about 544.5242915687.

The spelling of 161455103 in words is "one hundred sixty-one million, four hundred fifty-five thousand, one hundred three".