531414421 has 2 divisors, whose sum is σ = 531414422. Its totient is φ = 531414420.

The previous prime is 531414419. The next prime is 531414449. The reversal of 531414421 is 124414135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285238321 + 246176100 = 16889^2 + 15690^2 .

It is a cyclic number.

It is not a de Polignac number, because 531414421 - 2¹ = 531414419 is a prime.

Together with 531414419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531411421) 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, 265707210 + 265707211.

It is an arithmetic number, because the mean of its divisors is an integer number (265707211).

Almost surely, 2^531414421 is an apocalyptic number.

It is an amenable number.

531414421 is a deficient number, since it is larger than the sum of its proper divisors (1).

531414421 is an equidigital number, since it uses as much as digits as its factorization.

531414421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 531414421 is about 23052.4276595763. The cubic root of 531414421 is about 809.9864962439.

Adding to 531414421 its reverse (124414135), we get a palindrome (655828556).

The spelling of 531414421 in words is "five hundred thirty-one million, four hundred fourteen thousand, four hundred twenty-one".