255440533 has 2 divisors, whose sum is σ = 255440534. Its totient is φ = 255440532.

The previous prime is 255440501. The next prime is 255440539. The reversal of 255440533 is 335044552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211324369 + 44116164 = 14537^2 + 6642^2 .

It is a cyclic number.

It is not a de Polignac number, because 255440533 - 2⁵ = 255440501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255440495 and 255440504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255440539) 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, 127720266 + 127720267.

It is an arithmetic number, because the mean of its divisors is an integer number (127720267).

Almost surely, 2^255440533 is an apocalyptic number.

It is an amenable number.

255440533 is a deficient number, since it is larger than the sum of its proper divisors (1).

255440533 is an equidigital number, since it uses as much as digits as its factorization.

255440533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 31.

The square root of 255440533 is about 15982.5070936947. The cubic root of 255440533 is about 634.4975321173.

The spelling of 255440533 in words is "two hundred fifty-five million, four hundred forty thousand, five hundred thirty-three".