155173023 has 8 divisors (see below), whose sum is σ = 229886000. Its totient is φ = 103448664.

The previous prime is 155173021. The next prime is 155173063. The reversal of 155173023 is 320371551.

It is not a de Polignac number, because 155173023 - 2¹ = 155173021 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: 5747149 = 155173023 / (1 + 5 + 5 + 1 + 7 + 3 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155173021) 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, 2873548 + ... + 2873601.

It is an arithmetic number, because the mean of its divisors is an integer number (28735750).

Almost surely, 2^155173023 is an apocalyptic number.

155173023 is a deficient number, since it is larger than the sum of its proper divisors (74712977).

155173023 is an equidigital number, since it uses as much as digits as its factorization.

155173023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747158 (or 5747152 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 155173023 is about 12456.8464307785. The cubic root of 155173023 is about 537.3683375369.

The spelling of 155173023 in words is "one hundred fifty-five million, one hundred seventy-three thousand, twenty-three".