2219831 has 2 divisors, whose sum is σ = 2219832. Its totient is φ = 2219830.

The previous prime is 2219813. The next prime is 2219839. The reversal of 2219831 is 1389122.

Together with previous prime (2219813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2219831 - 2¹⁰ = 2218807 is a prime.

It is a super-2 number, since 2×2219831² = 9855299337122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2219831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2219839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109915 + 1109916.

It is an arithmetic number, because the mean of its divisors is an integer number (1109916).

2^2219831 is an apocalyptic number.

2219831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219831 is an equidigital number, since it uses as much as digits as its factorization.

2219831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 2219831 is about 1489.9097288091. The cubic root of 2219831 is about 130.4487646477.

The spelling of 2219831 in words is "two million, two hundred nineteen thousand, eight hundred thirty-one".