531901 has 2 divisors, whose sum is σ = 531902. Its totient is φ = 531900.

The previous prime is 531877. The next prime is 531911. The reversal of 531901 is 109135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280900 + 251001 = 530^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 531901 - 2¹⁵ = 499133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265950 + 265951.

It is an arithmetic number, because the mean of its divisors is an integer number (265951).

2⁵³¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

531901 is a deficient number, since it is larger than the sum of its proper divisors (1).

531901 is an equidigital number, since it uses as much as digits as its factorization.

531901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 531901 is about 729.3154324433. The cubic root of 531901 is about 81.0233636815.

The spelling of 531901 in words is "five hundred thirty-one thousand, nine hundred one".