31313241 has 6 divisors (see below), whose sum is σ = 45230250. Its totient is φ = 20875488.

The previous prime is 31313239. The next prime is 31313257. The reversal of 31313241 is 14231313.

It can be written as a sum of positive squares in only one way, i.e., 31304025 + 9216 = 5595^2 + 96^2 .

It is not a de Polignac number, because 31313241 - 2¹ = 31313239 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31313221) 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, 1739616 + ... + 1739633.

It is an arithmetic number, because the mean of its divisors is an integer number (7538375).

Almost surely, 2^31313241 is an apocalyptic number.

It is an amenable number.

31313241 is a deficient number, since it is larger than the sum of its proper divisors (13917009).

31313241 is a wasteful number, since it uses less digits than its factorization.

31313241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479255 (or 3479252 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31313241 is about 5595.8235318852. The cubic root of 31313241 is about 315.1925957499.

Adding to 31313241 its reverse (14231313), we get a palindrome (45544554).

The spelling of 31313241 in words is "thirty-one million, three hundred thirteen thousand, two hundred forty-one".