16554425 has 6 divisors (see below), whose sum is σ = 20527518. Its totient is φ = 13243520.

The previous prime is 16554407. The next prime is 16554437. The reversal of 16554425 is 52445561.

It can be written as a sum of positive squares in 3 ways, for example, as 2930944 + 13623481 = 1712^2 + 3691^2 .

It is not a de Polignac number, because 16554425 - 2⁸ = 16554169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16554391 and 16554400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331064 + ... + 331113.

It is an arithmetic number, because the mean of its divisors is an integer number (3421253).

Almost surely, 2^16554425 is an apocalyptic number.

It is an amenable number.

16554425 is a deficient number, since it is larger than the sum of its proper divisors (3973093).

16554425 is an equidigital number, since it uses as much as digits as its factorization.

16554425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662187 (or 662182 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 16554425 is about 4068.7129414595. The cubic root of 16554425 is about 254.8617730926.

Adding to 16554425 its reverse (52445561), we get a palindrome (68999986).

The spelling of 16554425 in words is "sixteen million, five hundred fifty-four thousand, four hundred twenty-five".