2223531 has 20 divisors (see below), whose sum is σ = 3367672. Its totient is φ = 1461888.

The previous prime is 2223521. The next prime is 2223541. The reversal of 2223531 is 1353222.

It is an interprime number because it is at equal distance from previous prime (2223521) and next prime (2223541).

It is not a de Polignac number, because 2223531 - 2⁵ = 2223499 is a prime.

It is a super-2 number, since 2×2223531² = 9888180215922, which contains 22 as substring.

It is a Duffinian number.

2223531 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7716 + ... + 7998.

2^2223531 is an apocalyptic number.

2223531 is a deficient number, since it is larger than the sum of its proper divisors (1144141).

2223531 is an equidigital number, since it uses as much as digits as its factorization.

2223531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 383 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 2223531 is about 1491.1508977967. The cubic root of 2223531 is about 130.5212014701.

Adding to 2223531 its reverse (1353222), we get a palindrome (3576753).

The spelling of 2223531 in words is "two million, two hundred twenty-three thousand, five hundred thirty-one".