531035381 has 2 divisors, whose sum is σ = 531035382. Its totient is φ = 531035380.

The previous prime is 531035287. The next prime is 531035383. The reversal of 531035381 is 183530135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530380900 + 654481 = 23030^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 531035381 - 2¹⁸ = 530773237 is a prime.

It is a super-2 number, since 2×531035381² = 563997151747630322, which contains 22 as substring.

Together with 531035383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531035383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265517690 + 265517691.

It is an arithmetic number, because the mean of its divisors is an integer number (265517691).

Almost surely, 2^531035381 is an apocalyptic number.

It is an amenable number.

531035381 is a deficient number, since it is larger than the sum of its proper divisors (1).

531035381 is an equidigital number, since it uses as much as digits as its factorization.

531035381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 531035381 is about 23044.2049331280. The cubic root of 531035381 is about 809.7938717476.

The spelling of 531035381 in words is "five hundred thirty-one million, thirty-five thousand, three hundred eighty-one".