1631223 has 12 divisors (see below), whose sum is σ = 2570568. Its totient is φ = 988560.

The previous prime is 1631209. The next prime is 1631243. The reversal of 1631223 is 3221361.

It is not a de Polignac number, because 1631223 - 2⁵ = 1631191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1631196 and 1631205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8140 + ... + 8337.

It is an arithmetic number, because the mean of its divisors is an integer number (214214).

2^1631223 is an apocalyptic number.

1631223 is a deficient number, since it is larger than the sum of its proper divisors (939345).

1631223 is a wasteful number, since it uses less digits than its factorization.

1631223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16494 (or 16491 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 1631223 is about 1277.1934074368. The cubic root of 1631223 is about 117.7166186631.

Adding to 1631223 its reverse (3221361), we get a palindrome (4852584).

The spelling of 1631223 in words is "one million, six hundred thirty-one thousand, two hundred twenty-three".