16225645 has 16 divisors (see below), whose sum is σ = 20262960. Its totient is φ = 12457984.

The previous prime is 16225621. The next prime is 16225681. The reversal of 16225645 is 54652261.

It can be written as a sum of positive squares in 8 ways, for example, as 2223081 + 14002564 = 1491^2 + 3742^2 .

It is a cyclic number.

It is not a de Polignac number, because 16225645 - 2⁵ = 16225613 is a prime.

It is a super-3 number, since 3×16225645³ (a number of 23 digits) contains 333 as substring.

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, 45789 + ... + 46141.

It is an arithmetic number, because the mean of its divisors is an integer number (1266435).

Almost surely, 2^16225645 is an apocalyptic number.

It is an amenable number.

16225645 is a deficient number, since it is larger than the sum of its proper divisors (4037315).

16225645 is a wasteful number, since it uses less digits than its factorization.

16225645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its digits is 14400, while the sum is 31.

The square root of 16225645 is about 4028.1068754441. The cubic root of 16225645 is about 253.1632466721.

The spelling of 16225645 in words is "sixteen million, two hundred twenty-five thousand, six hundred forty-five".