161225103 has 32 divisors (see below), whose sum is σ = 239067136. Its totient is φ = 96018048.

The previous prime is 161225039. The next prime is 161225107. The reversal of 161225103 is 301522161.

161225103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161225103 - 2⁶ = 161225039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161225103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161225107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212601 + ... + 213357.

It is an arithmetic number, because the mean of its divisors is an integer number (7470848).

Almost surely, 2^161225103 is an apocalyptic number.

161225103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161225103 is a deficient number, since it is larger than the sum of its proper divisors (77842033).

161225103 is a wasteful number, since it uses less digits than its factorization.

161225103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 161225103 is about 12697.4447429394. Note that the first 3 decimals coincide. The cubic root of 161225103 is about 544.2656023065.

Adding to 161225103 its reverse (301522161), we get a palindrome (462747264).

The spelling of 161225103 in words is "one hundred sixty-one million, two hundred twenty-five thousand, one hundred three".