161415203 has 8 divisors (see below), whose sum is σ = 170109120. Its totient is φ = 152741160.

The previous prime is 161415197. The next prime is 161415217. The reversal of 161415203 is 302514161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161415203 - 2⁸ = 161414947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161415253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13508 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (21263640).

Almost surely, 2^161415203 is an apocalyptic number.

161415203 is a deficient number, since it is larger than the sum of its proper divisors (8693917).

161415203 is an equidigital number, since it uses as much as digits as its factorization.

161415203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161415203 is about 12704.9282957441. The cubic root of 161415203 is about 544.4794322264.

Adding to 161415203 its reverse (302514161), we get a palindrome (463929364).

The spelling of 161415203 in words is "one hundred sixty-one million, four hundred fifteen thousand, two hundred three".