255512531 has 2 divisors, whose sum is σ = 255512532. Its totient is φ = 255512530.

The previous prime is 255512519. The next prime is 255512561. The reversal of 255512531 is 135215552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255512531 - 2¹⁰ = 255511507 is a prime.

It is a super-2 number, since 2×255512531² = 130573306996051922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255512494 and 255512503.

It is not a weakly prime, because it can be changed into another prime (255512561) 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, 127756265 + 127756266.

It is an arithmetic number, because the mean of its divisors is an integer number (127756266).

Almost surely, 2^255512531 is an apocalyptic number.

255512531 is a deficient number, since it is larger than the sum of its proper divisors (1).

255512531 is an equidigital number, since it uses as much as digits as its factorization.

255512531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7500, while the sum is 29.

The square root of 255512531 is about 15984.7593350666. The cubic root of 255512531 is about 634.5571392875.

It can be divided in two parts, 25551 and 2531, that added together give a palindrome (28082).

The spelling of 255512531 in words is "two hundred fifty-five million, five hundred twelve thousand, five hundred thirty-one".