15674221 has 8 divisors (see below), whose sum is σ = 17470080. Its totient is φ = 13975488.

The previous prime is 15674209. The next prime is 15674227. The reversal of 15674221 is 12247651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15674221 - 2⁷ = 15674093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15674221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15674227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23941 + ... + 24586.

It is an arithmetic number, because the mean of its divisors is an integer number (2183760).

Almost surely, 2^15674221 is an apocalyptic number.

It is an amenable number.

15674221 is a deficient number, since it is larger than the sum of its proper divisors (1795859).

15674221 is a wasteful number, since it uses less digits than its factorization.

15674221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48563.

The product of its digits is 3360, while the sum is 28.

The square root of 15674221 is about 3959.0681984528. The cubic root of 15674221 is about 250.2622368312.

The spelling of 15674221 in words is "fifteen million, six hundred seventy-four thousand, two hundred twenty-one".