161120519 has 4 divisors (see below), whose sum is σ = 184137744. Its totient is φ = 138103296.

The previous prime is 161120503. The next prime is 161120521. The reversal of 161120519 is 915021161.

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

It is a cyclic number.

It is not a de Polignac number, because 161120519 - 2⁴ = 161120503 is a prime.

It is a super-2 number, since 2×161120519² = 51919643285658722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161120419) 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 3 ways as a sum of consecutive naturals, for example, 11508602 + ... + 11508615.

It is an arithmetic number, because the mean of its divisors is an integer number (46034436).

Almost surely, 2^161120519 is an apocalyptic number.

161120519 is a deficient number, since it is larger than the sum of its proper divisors (23017225).

161120519 is an equidigital number, since it uses as much as digits as its factorization.

161120519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23017224.

The product of its (nonzero) digits is 540, while the sum is 26.

The square root of 161120519 is about 12693.3257659291. The cubic root of 161120519 is about 544.1478915507.

The spelling of 161120519 in words is "one hundred sixty-one million, one hundred twenty thousand, five hundred nineteen".