145631171 has 8 divisors (see below), whose sum is σ = 166581504. Its totient is φ = 124717320.

The previous prime is 145631119. The next prime is 145631183. The reversal of 145631171 is 171136541.

It is a happy number.

145631171 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 not a de Polignac number, because 145631171 - 2⁶ = 145631107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145631191) 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, 56 + ... + 17066.

It is an arithmetic number, because the mean of its divisors is an integer number (20822688).

Almost surely, 2^145631171 is an apocalyptic number.

145631171 is a deficient number, since it is larger than the sum of its proper divisors (20950333).

145631171 is a wasteful number, since it uses less digits than its factorization.

145631171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18241.

The product of its digits is 2520, while the sum is 29.

The square root of 145631171 is about 12067.7740698109. The cubic root of 145631171 is about 526.1199625666.

The spelling of 145631171 in words is "one hundred forty-five million, six hundred thirty-one thousand, one hundred seventy-one".