671223111 has 16 divisors (see below), whose sum is σ = 981995616. Its totient is φ = 405265536.

The previous prime is 671223109. The next prime is 671223139. The reversal of 671223111 is 111322176.

It is not a de Polignac number, because 671223111 - 2¹ = 671223109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671223151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160300 + ... + 164433.

It is an arithmetic number, because the mean of its divisors is an integer number (61374726).

Almost surely, 2^671223111 is an apocalyptic number.

671223111 is a deficient number, since it is larger than the sum of its proper divisors (310772505).

671223111 is a wasteful number, since it uses less digits than its factorization.

671223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324802.

The product of its digits is 504, while the sum is 24.

The square root of 671223111 is about 25907.9738883611. The cubic root of 671223111 is about 875.5661581123.

Adding to 671223111 its reverse (111322176), we get a palindrome (782545287).

The spelling of 671223111 in words is "six hundred seventy-one million, two hundred twenty-three thousand, one hundred eleven".