531025631 has 2 divisors, whose sum is σ = 531025632. Its totient is φ = 531025630.

The previous prime is 531025613. The next prime is 531025639. The reversal of 531025631 is 136520135.

Together with previous prime (531025613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531025631 - 2¹⁴ = 531009247 is a prime.

It is a super-2 number, since 2×531025631² = 563976441557896322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531025631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531025639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265512815 + 265512816.

It is an arithmetic number, because the mean of its divisors is an integer number (265512816).

Almost surely, 2^531025631 is an apocalyptic number.

531025631 is a deficient number, since it is larger than the sum of its proper divisors (1).

531025631 is an equidigital number, since it uses as much as digits as its factorization.

531025631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 531025631 is about 23043.9933822244. The cubic root of 531025631 is about 809.7889156820.

Adding to 531025631 its reverse (136520135), we get a palindrome (667545766).

The spelling of 531025631 in words is "five hundred thirty-one million, twenty-five thousand, six hundred thirty-one".