31102241 has 2 divisors, whose sum is σ = 31102242. Its totient is φ = 31102240.

The previous prime is 31102229. The next prime is 31102273. The reversal of 31102241 is 14220113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 355216 = 5545^2 + 596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31102241 is a prime.

It is not a weakly prime, because it can be changed into another prime (31108241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551120 + 15551121.

It is an arithmetic number, because the mean of its divisors is an integer number (15551121).

Almost surely, 2^31102241 is an apocalyptic number.

It is an amenable number.

31102241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102241 is an equidigital number, since it uses as much as digits as its factorization.

31102241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31102241 is about 5576.9383177511. The cubic root of 31102241 is about 314.4830388444.

Adding to 31102241 its reverse (14220113), we get a palindrome (45322354).

The spelling of 31102241 in words is "thirty-one million, one hundred two thousand, two hundred forty-one".