531402761 has 2 divisors, whose sum is σ = 531402762. Its totient is φ = 531402760.

The previous prime is 531402749. The next prime is 531402803. The reversal of 531402761 is 167204135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363855625 + 167547136 = 19075^2 + 12944^2 .

It is a cyclic number.

It is not a de Polignac number, because 531402761 - 2¹⁴ = 531386377 is a prime.

It is equal to p_27920423 and since 531402761 and 27920423 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (531402701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265701380 + 265701381.

It is an arithmetic number, because the mean of its divisors is an integer number (265701381).

Almost surely, 2^531402761 is an apocalyptic number.

It is an amenable number.

531402761 is a deficient number, since it is larger than the sum of its proper divisors (1).

531402761 is an equidigital number, since it uses as much as digits as its factorization.

531402761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 531402761 is about 23052.1747564086. The cubic root of 531402761 is about 809.9805721093.

Adding to 531402761 its reverse (167204135), we get a palindrome (698606896).

The spelling of 531402761 in words is "five hundred thirty-one million, four hundred two thousand, seven hundred sixty-one".