155120519 has 2 divisors, whose sum is σ = 155120520. Its totient is φ = 155120518.

The previous prime is 155120509. The next prime is 155120521. The reversal of 155120519 is 915021551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155120519 - 2²⁰ = 154071943 is a prime.

It is a super-2 number, since 2×155120519² = 48124750829658722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 155120521, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155120491 and 155120500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155120509) 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 as a sum of consecutive naturals, namely, 77560259 + 77560260.

It is an arithmetic number, because the mean of its divisors is an integer number (77560260).

Almost surely, 2^155120519 is an apocalyptic number.

155120519 is a deficient number, since it is larger than the sum of its proper divisors (1).

155120519 is an equidigital number, since it uses as much as digits as its factorization.

155120519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 29.

The square root of 155120519 is about 12454.7388170126. The cubic root of 155120519 is about 537.3077231136.

The spelling of 155120519 in words is "one hundred fifty-five million, one hundred twenty thousand, five hundred nineteen".