Search a number
-
+
16813481 is a prime number
BaseRepresentation
bin100000000100…
…0110110101001
31011122012202112
41000020312221
513301012411
61400212105
7262624616
oct100106651
934565675
1016813481
119544243
12576a035
133638c09
14233950d
151721b8b
hex1008da9

16813481 has 2 divisors, whose sum is σ = 16813482. Its totient is φ = 16813480.

The previous prime is 16813463. The next prime is 16813507. The reversal of 16813481 is 18431861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 3481 = 4100^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 16813481 - 210 = 16812457 is a prime.

It is a super-2 number, since 2×168134812 = 565386286674722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16813681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406740 + 8406741.

It is an arithmetic number, because the mean of its divisors is an integer number (8406741).

Almost surely, 216813481 is an apocalyptic number.

It is an amenable number.

16813481 is a deficient number, since it is larger than the sum of its proper divisors (1).

16813481 is an equidigital number, since it uses as much as digits as its factorization.

16813481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 32.

The square root of 16813481 is about 4100.4244902205. The cubic root of 16813481 is about 256.1843205854.

It can be divided in two parts, 1681 and 3481, that multiplied together give a square (5851561 = 24192).

The spelling of 16813481 in words is "sixteen million, eight hundred thirteen thousand, four hundred eighty-one".