31024161 has 16 divisors (see below), whose sum is σ = 52528000. Its totient is φ = 17727984.

The previous prime is 31024159. The next prime is 31024187. The reversal of 31024161 is 16142013.

It is a happy number.

It is not a de Polignac number, because 31024161 - 2¹ = 31024159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31024121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81886 + ... + 82263.

It is an arithmetic number, because the mean of its divisors is an integer number (3283000).

Almost surely, 2^31024161 is an apocalyptic number.

It is an amenable number.

31024161 is a deficient number, since it is larger than the sum of its proper divisors (21503839).

31024161 is a wasteful number, since it uses less digits than its factorization.

31024161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164165 (or 164159 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 31024161 is about 5569.9336620825. The cubic root of 31024161 is about 314.2196557642.

Adding to 31024161 its reverse (16142013), we get a palindrome (47166174).

The spelling of 31024161 in words is "thirty-one million, twenty-four thousand, one hundred sixty-one".