155028871 has 4 divisors (see below), whose sum is σ = 155444872. Its totient is φ = 154612872.

The previous prime is 155028817. The next prime is 155028883. The reversal of 155028871 is 178820551.

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 155028871 - 2⁹ = 155028359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155028871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155028971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207441 + ... + 208186.

It is an arithmetic number, because the mean of its divisors is an integer number (38861218).

Almost surely, 2^155028871 is an apocalyptic number.

155028871 is a deficient number, since it is larger than the sum of its proper divisors (416001).

155028871 is an equidigital number, since it uses as much as digits as its factorization.

155028871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416000.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 155028871 is about 12451.0590312632. The cubic root of 155028871 is about 537.2018852364.

The spelling of 155028871 in words is "one hundred fifty-five million, twenty-eight thousand, eight hundred seventy-one".