31135841 has 6 divisors (see below), whose sum is σ = 34223826. Its totient is φ = 28305200.

The previous prime is 31135831. The next prime is 31135877. The reversal of 31135841 is 14853113.

It can be written as a sum of positive squares in only one way, i.e., 26050816 + 5085025 = 5104^2 + 2255^2 .

It is not a de Polignac number, because 31135841 - 2⁶ = 31135777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31135841.

It is not an unprimeable number, because it can be changed into a prime (31135831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128540 + ... + 128781.

It is an arithmetic number, because the mean of its divisors is an integer number (5703971).

Almost surely, 2^31135841 is an apocalyptic number.

It is an amenable number.

31135841 is a deficient number, since it is larger than the sum of its proper divisors (3087985).

31135841 is a wasteful number, since it uses less digits than its factorization.

31135841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257343 (or 257332 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 31135841 is about 5579.9499101694. The cubic root of 31135841 is about 314.5962442703.

Adding to 31135841 its reverse (14853113), we get a palindrome (45988954).

The spelling of 31135841 in words is "thirty-one million, one hundred thirty-five thousand, eight hundred forty-one".