161304519 has 4 divisors (see below), whose sum is σ = 215072696. Its totient is φ = 107536344.

The previous prime is 161304511. The next prime is 161304527. The reversal of 161304519 is 915403161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (161304511) and next prime (161304527).

It is not a de Polignac number, because 161304519 - 2³ = 161304511 is a prime.

It is a super-2 number, since 2×161304519² = 52038295699642722, 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 (161304511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26884084 + ... + 26884089.

It is an arithmetic number, because the mean of its divisors is an integer number (53768174).

Almost surely, 2^161304519 is an apocalyptic number.

161304519 is a deficient number, since it is larger than the sum of its proper divisors (53768177).

161304519 is an equidigital number, since it uses as much as digits as its factorization.

161304519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53768176.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 161304519 is about 12700.5716013099. The cubic root of 161304519 is about 544.3549521270.

The spelling of 161304519 in words is "one hundred sixty-one million, three hundred four thousand, five hundred nineteen".