3111481 has 2 divisors, whose sum is σ = 3111482. Its totient is φ = 3111480.

The previous prime is 3111457. The next prime is 3111487. The reversal of 3111481 is 1841113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2835856 + 275625 = 1684^2 + 525^2 .

It is an emirp because it is prime and its reverse (1841113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111481 is a prime.

It is a super-2 number, since 2×3111481² = 19362628026722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3111487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555740 + 1555741.

It is an arithmetic number, because the mean of its divisors is an integer number (1555741).

Almost surely, 2^3111481 is an apocalyptic number.

It is an amenable number.

3111481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111481 is an equidigital number, since it uses as much as digits as its factorization.

3111481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 19.

The square root of 3111481 is about 1763.9390579042. The cubic root of 3111481 is about 145.9897565841.

Adding to 3111481 its reverse (1841113), we get a palindrome (4952594).

The spelling of 3111481 in words is "three million, one hundred eleven thousand, four hundred eighty-one".