263125531 has 2 divisors, whose sum is σ = 263125532. Its totient is φ = 263125530.

The previous prime is 263125501. The next prime is 263125571. The reversal of 263125531 is 135521362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263125531 - 2⁷ = 263125403 is a prime.

It is a super-2 number, since 2×263125531² = 138470090128063922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 263125531.

It is not a weakly prime, because it can be changed into another prime (263125501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131562765 + 131562766.

It is an arithmetic number, because the mean of its divisors is an integer number (131562766).

Almost surely, 2^263125531 is an apocalyptic number.

263125531 is a deficient number, since it is larger than the sum of its proper divisors (1).

263125531 is an equidigital number, since it uses as much as digits as its factorization.

263125531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 263125531 is about 16221.1445650423. The cubic root of 263125531 is about 640.7977771090.

Adding to 263125531 its reverse (135521362), we get a palindrome (398646893).

The spelling of 263125531 in words is "two hundred sixty-three million, one hundred twenty-five thousand, five hundred thirty-one".