531141881 has 2 divisors, whose sum is σ = 531141882. Its totient is φ = 531141880.

The previous prime is 531141869. The next prime is 531141883. The reversal of 531141881 is 188141135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284934400 + 246207481 = 16880^2 + 15691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531141881 is a prime.

It is a super-2 number, since 2×531141881² = 564223395504436322, which contains 22 as substring.

Together with 531141883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531141883) 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, 265570940 + 265570941.

It is an arithmetic number, because the mean of its divisors is an integer number (265570941).

Almost surely, 2^531141881 is an apocalyptic number.

It is an amenable number.

531141881 is a deficient number, since it is larger than the sum of its proper divisors (1).

531141881 is an equidigital number, since it uses as much as digits as its factorization.

531141881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 32.

The square root of 531141881 is about 23046.5155934688. The cubic root of 531141881 is about 809.8480032837.

The spelling of 531141881 in words is "five hundred thirty-one million, one hundred forty-one thousand, eight hundred eighty-one".