161122303 has 4 divisors (see below), whose sum is σ = 161481600. Its totient is φ = 160763008.

The previous prime is 161122259. The next prime is 161122319. The reversal of 161122303 is 303221161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303221161 = 83 ⋅3653267.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161122303 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 (161122373) 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, 178975 + ... + 179872.

It is an arithmetic number, because the mean of its divisors is an integer number (40370400).

Almost surely, 2^161122303 is an apocalyptic number.

161122303 is a deficient number, since it is larger than the sum of its proper divisors (359297).

161122303 is an equidigital number, since it uses as much as digits as its factorization.

161122303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359296.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 161122303 is about 12693.3960388857. The cubic root of 161122303 is about 544.1498998946.

Adding to 161122303 its reverse (303221161), we get a palindrome (464343464).

The spelling of 161122303 in words is "one hundred sixty-one million, one hundred twenty-two thousand, three hundred three".