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16813025 = 52672521
BaseRepresentation
bin100000000100…
…0101111100001
31011122012010122
41000020233201
513301004100
61400210025
7262623365
oct100105741
934565118
1016813025
119543969
125769915
133638948
1423392a5
151721985
hex1008be1

16813025 has 6 divisors (see below), whose sum is σ = 20848182. Its totient is φ = 13450400.

The previous prime is 16813021. The next prime is 16813033. The reversal of 16813025 is 52031861.

It can be written as a sum of positive squares in 3 ways, for example, as 5837056 + 10975969 = 2416^2 + 3313^2 .

It is not a de Polignac number, because 16813025 - 22 = 16813021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16812985 and 16813003.

It is not an unprimeable number, because it can be changed into a prime (16813021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 336236 + ... + 336285.

It is an arithmetic number, because the mean of its divisors is an integer number (3474697).

Almost surely, 216813025 is an apocalyptic number.

It is an amenable number.

16813025 is a deficient number, since it is larger than the sum of its proper divisors (4035157).

16813025 is an equidigital number, since it uses as much as digits as its factorization.

16813025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672531 (or 672526 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 16813025 is about 4100.3688858443. The cubic root of 16813025 is about 256.1820045647.

Adding to 16813025 its reverse (52031861), we get a palindrome (68844886).

It can be divided in two parts, 1681 and 3025, that multiplied together give a square (5085025 = 22552).

The spelling of 16813025 in words is "sixteen million, eight hundred thirteen thousand, twenty-five".

Divisors: 1 5 25 672521 3362605 16813025