16221702 has 32 divisors (see below), whose sum is σ = 37555200. Its totient is φ = 4575168.

The previous prime is 16221697. The next prime is 16221703. The reversal of 16221702 is 20712261.

16221702 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221703) 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, 874 + ... + 5762.

It is an arithmetic number, because the mean of its divisors is an integer number (1173600).

Almost surely, 2^16221702 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16221702, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18777600).

16221702 is an abundant number, since it is smaller than the sum of its proper divisors (21333498).

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

16221702 is a wasteful number, since it uses less digits than its factorization.

16221702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 16221702 is about 4027.6174098343. The cubic root of 16221702 is about 253.1427379126.

Adding to 16221702 its reverse (20712261), we get a palindrome (36933963).

The spelling of 16221702 in words is "sixteen million, two hundred twenty-one thousand, seven hundred two".