155656271 has 4 divisors (see below), whose sum is σ = 155866512. Its totient is φ = 155446032.

The previous prime is 155656261. The next prime is 155656273. The reversal of 155656271 is 172656551.

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 155656271 - 2²² = 151461967 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 (155656273) 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, 104006 + ... + 105491.

It is an arithmetic number, because the mean of its divisors is an integer number (38966628).

Almost surely, 2^155656271 is an apocalyptic number.

155656271 is a deficient number, since it is larger than the sum of its proper divisors (210241).

155656271 is an equidigital number, since it uses as much as digits as its factorization.

155656271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210240.

The product of its digits is 63000, while the sum is 38.

The square root of 155656271 is about 12476.2282361297. The cubic root of 155656271 is about 537.9255930504.

The spelling of 155656271 in words is "one hundred fifty-five million, six hundred fifty-six thousand, two hundred seventy-one".