16222725 has 18 divisors (see below), whose sum is σ = 29057106. Its totient is φ = 8652000.

The previous prime is 16222697. The next prime is 16222727. The reversal of 16222725 is 52722261.

16222725 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 can be written as a sum of positive squares in 3 ways, for example, as 86436 + 16136289 = 294^2 + 4017^2 .

It is not a de Polignac number, because 16222725 - 2⁸ = 16222469 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16222727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35826 + ... + 36275.

Almost surely, 2^16222725 is an apocalyptic number.

16222725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16222725 is a deficient number, since it is larger than the sum of its proper divisors (12834381).

16222725 is a wasteful number, since it uses less digits than its factorization.

16222725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72117 (or 72109 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 16222725 is about 4027.7444059920. The cubic root of 16222725 is about 253.1480591704.

Adding to 16222725 its reverse (52722261), we get a palindrome (68944986).

The spelling of 16222725 in words is "sixteen million, two hundred twenty-two thousand, seven hundred twenty-five".