823151 has 12 divisors (see below), whose sum is σ = 972648. Its totient is φ = 694512.

The previous prime is 823129. The next prime is 823153. The reversal of 823151 is 151328.

It is a de Polignac number, because none of the positive numbers 2^k-823151 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5165 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (81054).

2⁸²³¹⁵¹ is an apocalyptic number.

823151 is a deficient number, since it is larger than the sum of its proper divisors (149497).

823151 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (823150) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (271).

823151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 271 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 823151 is about 907.2766942890. The cubic root of 823151 is about 93.7187534386.

Adding to 823151 its reverse (151328), we get a palindrome (974479).

The spelling of 823151 in words is "eight hundred twenty-three thousand, one hundred fifty-one".