155040193 has 16 divisors (see below), whose sum is σ = 193729536. Its totient is φ = 120540240.

The previous prime is 155040191. The next prime is 155040227. The reversal of 155040193 is 391040551.

It is a cyclic number.

It is not a de Polignac number, because 155040193 - 2¹ = 155040191 is a prime.

It is a super-2 number, since 2×155040193² = 48074922890954498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155040191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36730 + ... + 40732.

It is an arithmetic number, because the mean of its divisors is an integer number (12108096).

Almost surely, 2^155040193 is an apocalyptic number.

It is an amenable number.

155040193 is a deficient number, since it is larger than the sum of its proper divisors (38689343).

155040193 is a wasteful number, since it uses less digits than its factorization.

155040193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 155040193 is about 12451.5136830829. The cubic root of 155040193 is about 537.2149624816.

The spelling of 155040193 in words is "one hundred fifty-five million, forty thousand, one hundred ninety-three".