161403235 has 16 divisors (see below), whose sum is σ = 224474112. Its totient is φ = 109116000.

The previous prime is 161403227. The next prime is 161403239. The reversal of 161403235 is 532304161.

It is not a de Polignac number, because 161403235 - 2³ = 161403227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161403239) 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, 29991 + ... + 34960.

It is an arithmetic number, because the mean of its divisors is an integer number (14029632).

Almost surely, 2^161403235 is an apocalyptic number.

161403235 is a deficient number, since it is larger than the sum of its proper divisors (63070877).

161403235 is an equidigital number, since it uses as much as digits as its factorization.

161403235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65034.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 161403235 is about 12704.4572886842. The cubic root of 161403235 is about 544.4659752310.

Adding to 161403235 its reverse (532304161), we get a palindrome (693707396).

The spelling of 161403235 in words is "one hundred sixty-one million, four hundred three thousand, two hundred thirty-five".