155520163 has 2 divisors, whose sum is σ = 155520164. Its totient is φ = 155520162.

The previous prime is 155520161. The next prime is 155520173. The reversal of 155520163 is 361025551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155520163 - 2¹ = 155520161 is a prime.

Together with 155520161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155520161) 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 as a sum of consecutive naturals, namely, 77760081 + 77760082.

It is an arithmetic number, because the mean of its divisors is an integer number (77760082).

Almost surely, 2^155520163 is an apocalyptic number.

155520163 is a deficient number, since it is larger than the sum of its proper divisors (1).

155520163 is an equidigital number, since it uses as much as digits as its factorization.

155520163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 155520163 is about 12470.7723497785. The cubic root of 155520163 is about 537.7687574646.

The spelling of 155520163 in words is "one hundred fifty-five million, five hundred twenty thousand, one hundred sixty-three".