3031861 has 4 divisors (see below), whose sum is σ = 3464992. Its totient is φ = 2598732.

The previous prime is 3031843. The next prime is 3031867. The reversal of 3031861 is 1681303.

3031861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3031861 is a prime.

It is a super-2 number, since 2×3031861² = 18384362246642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3031867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216555 + ... + 216568.

It is an arithmetic number, because the mean of its divisors is an integer number (866248).

Almost surely, 2^3031861 is an apocalyptic number.

It is an amenable number.

3031861 is a deficient number, since it is larger than the sum of its proper divisors (433131).

3031861 is an equidigital number, since it uses as much as digits as its factorization.

3031861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433130.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 3031861 is about 1741.2239947807. The cubic root of 3031861 is about 144.7337325103.

The spelling of 3031861 in words is "three million, thirty-one thousand, eight hundred sixty-one".