531021461 has 2 divisors, whose sum is σ = 531021462. Its totient is φ = 531021460.

The previous prime is 531021427. The next prime is 531021473. The reversal of 531021461 is 164120135.

531021461 = 16294² + 16295².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265527025 + 265494436 = 16295^2 + 16294^2 .

It is a cyclic number.

It is not a de Polignac number, because 531021461 - 2¹⁰ = 531020437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531021761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265510730 + 265510731.

It is an arithmetic number, because the mean of its divisors is an integer number (265510731).

Almost surely, 2^531021461 is an apocalyptic number.

531021461 is the 16295-th centered square number.

It is an amenable number.

531021461 is a deficient number, since it is larger than the sum of its proper divisors (1).

531021461 is an equidigital number, since it uses as much as digits as its factorization.

531021461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 531021461 is about 23043.9029029373. The cubic root of 531021461 is about 809.7867959923.

Adding to 531021461 its reverse (164120135), we get a palindrome (695141596).

The spelling of 531021461 in words is "five hundred thirty-one million, twenty-one thousand, four hundred sixty-one".