155791271 has 8 divisors (see below), whose sum is σ = 158996400. Its totient is φ = 152615232.

The previous prime is 155791261. The next prime is 155791289. The reversal of 155791271 is 172197551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155791271 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 (155791231) 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, 3716 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (19874550).

Almost surely, 2^155791271 is an apocalyptic number.

155791271 is a deficient number, since it is larger than the sum of its proper divisors (3205129).

155791271 is a wasteful number, since it uses less digits than its factorization.

155791271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14545.

The product of its digits is 22050, while the sum is 38.

The square root of 155791271 is about 12481.6373525271. The cubic root of 155791271 is about 538.0810616146.

The spelling of 155791271 in words is "one hundred fifty-five million, seven hundred ninety-one thousand, two hundred seventy-one".