161301303 has 12 divisors (see below), whose sum is σ = 234827008. Its totient is φ = 106686720.

The previous prime is 161301293. The next prime is 161301307. The reversal of 161301303 is 303103161.

161301303 is a `hidden beast` number, since 1 + 61 + 301 + 303 = 666.

It is not a de Polignac number, because 161301303 - 2²¹ = 159204151 is a prime.

It is a super-2 number, since 2×161301303² = 52036220698995618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161301307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69418 + ... + 71703.

Almost surely, 2^161301303 is an apocalyptic number.

161301303 is a deficient number, since it is larger than the sum of its proper divisors (73525705).

161301303 is a wasteful number, since it uses less digits than its factorization.

161301303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141254 (or 141251 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 161301303 is about 12700.4449922040. Note that the first 3 decimals coincide. The cubic root of 161301303 is about 544.3513344206.

Adding to 161301303 its reverse (303103161), we get a palindrome (464404464).

It can be divided in two parts, 161301 and 303, that added together give a square (161604 = 402²).

The spelling of 161301303 in words is "one hundred sixty-one million, three hundred one thousand, three hundred three".