2131223 has 2 divisors, whose sum is σ = 2131224. Its totient is φ = 2131222.

The previous prime is 2131193. The next prime is 2131231. The reversal of 2131223 is 3221312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131223 - 2²⁰ = 1082647 is a prime.

It is a super-2 number, since 2×2131223² = 9084222951458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2131198 and 2131207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065611 + 1065612.

It is an arithmetic number, because the mean of its divisors is an integer number (1065612).

2^2131223 is an apocalyptic number.

2131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131223 is an equidigital number, since it uses as much as digits as its factorization.

2131223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 14.

The square root of 2131223 is about 1459.8708847018. The cubic root of 2131223 is about 128.6894559339.

Adding to 2131223 its reverse (3221312), we get a palindrome (5352535).

The spelling of 2131223 in words is "two million, one hundred thirty-one thousand, two hundred twenty-three".