161036203 has 2 divisors, whose sum is σ = 161036204. Its totient is φ = 161036202.

The previous prime is 161036171. The next prime is 161036209. The reversal of 161036203 is 302630161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161036203 - 2⁵ = 161036171 is a prime.

It is not a weakly prime, because it can be changed into another prime (161036209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80518101 + 80518102.

It is an arithmetic number, because the mean of its divisors is an integer number (80518102).

Almost surely, 2^161036203 is an apocalyptic number.

161036203 is a deficient number, since it is larger than the sum of its proper divisors (1).

161036203 is an equidigital number, since it uses as much as digits as its factorization.

161036203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 161036203 is about 12690.0040583130. The cubic root of 161036203 is about 544.0529556202.

Adding to 161036203 its reverse (302630161), we get a palindrome (463666364).

The spelling of 161036203 in words is "one hundred sixty-one million, thirty-six thousand, two hundred three".