531921427 has 2 divisors, whose sum is σ = 531921428. Its totient is φ = 531921426.

The previous prime is 531921389. The next prime is 531921433. The reversal of 531921427 is 724129135.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531921427 - 2¹¹ = 531919379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531921392 and 531921401.

It is not a weakly prime, because it can be changed into another prime (531921827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265960713 + 265960714.

It is an arithmetic number, because the mean of its divisors is an integer number (265960714).

Almost surely, 2^531921427 is an apocalyptic number.

531921427 is a deficient number, since it is larger than the sum of its proper divisors (1).

531921427 is an equidigital number, since it uses as much as digits as its factorization.

531921427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 531921427 is about 23063.4218406550. The cubic root of 531921427 is about 810.2440086891.

The spelling of 531921427 in words is "five hundred thirty-one million, nine hundred twenty-one thousand, four hundred twenty-seven".