31331241 has 12 divisors (see below), whose sum is σ = 45369220. Its totient is φ = 20835360.

The previous prime is 31331239. The next prime is 31331243. The reversal of 31331241 is 14213313.

31331241 is a `hidden beast` number, since 313 + 312 + 41 = 666.

It is an interprime number because it is at equal distance from previous prime (31331239) and next prime (31331243).

It can be written as a sum of positive squares in 2 ways, for example, as 12278016 + 19053225 = 3504^2 + 4365^2 .

It is not a de Polignac number, because 31331241 - 2¹ = 31331239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346 + ... + 7923.

Almost surely, 2^31331241 is an apocalyptic number.

It is an amenable number.

31331241 is a deficient number, since it is larger than the sum of its proper divisors (14037979).

31331241 is a wasteful number, since it uses less digits than its factorization.

31331241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696 (or 8693 counting only the distinct ones).

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

The square root of 31331241 is about 5597.4316431735. The cubic root of 31331241 is about 315.2529789380.

Adding to 31331241 its reverse (14213313), we get a palindrome (45544554).

The spelling of 31331241 in words is "thirty-one million, three hundred thirty-one thousand, two hundred forty-one".