161508103 has 4 divisors (see below), whose sum is σ = 162592200. Its totient is φ = 160424008.

The previous prime is 161508101. The next prime is 161508107. The reversal of 161508103 is 301805161.

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 161508103 - 2¹ = 161508101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161508101) 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, 541825 + ... + 542122.

It is an arithmetic number, because the mean of its divisors is an integer number (40648050).

Almost surely, 2^161508103 is an apocalyptic number.

161508103 is a deficient number, since it is larger than the sum of its proper divisors (1084097).

161508103 is a wasteful number, since it uses less digits than its factorization.

161508103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084096.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 161508103 is about 12708.5838314110. The cubic root of 161508103 is about 544.5838677390.

The spelling of 161508103 in words is "one hundred sixty-one million, five hundred eight thousand, one hundred three".