155554871 has 4 divisors (see below), whose sum is σ = 157524000. Its totient is φ = 153585744.

The previous prime is 155554849. The next prime is 155554873. The reversal of 155554871 is 178455551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155554871 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 (155554873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984446 + ... + 984603.

It is an arithmetic number, because the mean of its divisors is an integer number (39381000).

Almost surely, 2^155554871 is an apocalyptic number.

155554871 is a deficient number, since it is larger than the sum of its proper divisors (1969129).

155554871 is an equidigital number, since it uses as much as digits as its factorization.

155554871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969128.

The product of its digits is 140000, while the sum is 41.

The square root of 155554871 is about 12472.1638459411. The cubic root of 155554871 is about 537.8087597583.

The spelling of 155554871 in words is "one hundred fifty-five million, five hundred fifty-four thousand, eight hundred seventy-one".