531101 has 2 divisors, whose sum is σ = 531102. Its totient is φ = 531100.

The previous prime is 531079. The next prime is 531103. The reversal of 531101 is 101135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 5476 = 725^2 + 74^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531101 is a prime.

It is a Sophie Germain prime.

Together with 531103, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265550 + 265551.

It is an arithmetic number, because the mean of its divisors is an integer number (265551).

2⁵³¹¹⁰¹ is an apocalyptic number.

It is an amenable number.

531101 is a deficient number, since it is larger than the sum of its proper divisors (1).

531101 is an equidigital number, since it uses as much as digits as its factorization.

531101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 531101 is about 728.7667665310. The cubic root of 531101 is about 80.9827225254.

Adding to 531101 its reverse (101135), we get a palindrome (632236).

The spelling of 531101 in words is "five hundred thirty-one thousand, one hundred one".