155631171 has 8 divisors (see below), whose sum is σ = 209345040. Its totient is φ = 102835712.

The previous prime is 155631169. The next prime is 155631199. The reversal of 155631171 is 171136551.

155631171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 155631171 - 2¹ = 155631169 is a prime.

It is a super-2 number, since 2×155631171² = 48442122773662482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155631101) 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, 229206 + ... + 229883.

It is an arithmetic number, because the mean of its divisors is an integer number (26168130).

Almost surely, 2^155631171 is an apocalyptic number.

155631171 is a deficient number, since it is larger than the sum of its proper divisors (53713869).

155631171 is a wasteful number, since it uses less digits than its factorization.

155631171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459205.

The product of its digits is 3150, while the sum is 30.

The square root of 155631171 is about 12475.2222825888. Note that the first 4 decimals coincide. The cubic root of 155631171 is about 537.8966775044.

The spelling of 155631171 in words is "one hundred fifty-five million, six hundred thirty-one thousand, one hundred seventy-one".