16221774 has 32 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 5063552.

The previous prime is 16221761. The next prime is 16221823. The reversal of 16221774 is 47712261.

16221774 = T₁₇ + T₁₈ + ... + T₄₅₉.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36397 + ... + 36839.

It is an arithmetic number, because the mean of its divisors is an integer number (1078920).

Almost surely, 2^16221774 is an apocalyptic number.

16221774 is an abundant number, since it is smaller than the sum of its proper divisors (18303666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16221774 is a wasteful number, since it uses less digits than its factorization.

16221774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824.

The product of its digits is 4704, while the sum is 30.

The square root of 16221774 is about 4027.6263481113. The cubic root of 16221774 is about 253.1431124366.

The spelling of 16221774 in words is "sixteen million, two hundred twenty-one thousand, seven hundred seventy-four".