155052171 has 8 divisors (see below), whose sum is σ = 229706960. Its totient is φ = 103368096.

The previous prime is 155052169. The next prime is 155052181. The reversal of 155052171 is 171250551.

It is not a de Polignac number, because 155052171 - 2¹ = 155052169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5742673 = 155052171 / (1 + 5 + 5 + 0 + 5 + 2 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155052181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2871310 + ... + 2871363.

It is an arithmetic number, because the mean of its divisors is an integer number (28713370).

Almost surely, 2^155052171 is an apocalyptic number.

155052171 is a deficient number, since it is larger than the sum of its proper divisors (74654789).

155052171 is an equidigital number, since it uses as much as digits as its factorization.

155052171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742682 (or 5742676 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 155052171 is about 12451.9946594913. The cubic root of 155052171 is about 537.2287967332.

The spelling of 155052171 in words is "one hundred fifty-five million, fifty-two thousand, one hundred seventy-one".