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531481 is a prime number
BaseRepresentation
bin10000001110000011001
31000000001111
42001300121
5114001411
615220321
74342336
oct2016031
91000044
10531481
11333345
122176a1
13157bb2
14db98d
15a7721
hex81c19

531481 has 2 divisors, whose sum is σ = 531482. Its totient is φ = 531480.

The previous prime is 531457. The next prime is 531497. The reversal of 531481 is 184135.

531481 = 5152 + 5162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266256 + 265225 = 516^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 531481 - 27 = 531353 is a prime.

It is a super-2 number, since 2×5314812 = 564944106722, which contains 22 as substring.

It is a plaindrome in base 11.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (531281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265740 + 265741.

It is an arithmetic number, because the mean of its divisors is an integer number (265741).

2531481 is an apocalyptic number.

531481 is the 516-th centered square number.

It is an amenable number.

531481 is a deficient number, since it is larger than the sum of its proper divisors (1).

531481 is an equidigital number, since it uses as much as digits as its factorization.

531481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 531481 is about 729.0274343260. The cubic root of 531481 is about 81.0020321596.

The spelling of 531481 in words is "five hundred thirty-one thousand, four hundred eighty-one".