674216221 has 16 divisors (see below), whose sum is σ = 797981184. Its totient is φ = 557638704.

The previous prime is 674216219. The next prime is 674216237. The reversal of 674216221 is 122612476.

It is not a de Polignac number, because 674216221 - 2¹ = 674216219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674210221) 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, 11490 + ... + 38476.

It is an arithmetic number, because the mean of its divisors is an integer number (49873824).

Almost surely, 2^674216221 is an apocalyptic number.

It is an amenable number.

674216221 is a deficient number, since it is larger than the sum of its proper divisors (123764963).

674216221 is a wasteful number, since it uses less digits than its factorization.

674216221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27120.

The product of its digits is 8064, while the sum is 31.

The square root of 674216221 is about 25965.6738984375. The cubic root of 674216221 is about 876.8656664550.

Adding to 674216221 its reverse (122612476), we get a palindrome (796828697).

The spelling of 674216221 in words is "six hundred seventy-four million, two hundred sixteen thousand, two hundred twenty-one".