31674221 has 4 divisors (see below), whose sum is σ = 31687200. Its totient is φ = 31661244.

The previous prime is 31674217. The next prime is 31674241. The reversal of 31674221 is 12247613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31674221 - 2² = 31674217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31674241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601 + ... + 8118.

It is an arithmetic number, because the mean of its divisors is an integer number (7921800).

Almost surely, 2^31674221 is an apocalyptic number.

It is an amenable number.

31674221 is a deficient number, since it is larger than the sum of its proper divisors (12979).

31674221 is an equidigital number, since it uses as much as digits as its factorization.

31674221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12978.

The product of its digits is 2016, while the sum is 26.

The square root of 31674221 is about 5627.9855188158. The cubic root of 31674221 is about 316.3991544391.

The spelling of 31674221 in words is "thirty-one million, six hundred seventy-four thousand, two hundred twenty-one".