255557629 has 2 divisors, whose sum is σ = 255557630. Its totient is φ = 255557628.

The previous prime is 255557611. The next prime is 255557639. The reversal of 255557629 is 926755552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130005604 + 125552025 = 11402^2 + 11205^2 .

It is a cyclic number.

It is not a de Polignac number, because 255557629 - 2²¹ = 253460477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255557639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127778814 + 127778815.

It is an arithmetic number, because the mean of its divisors is an integer number (127778815).

Almost surely, 2^255557629 is an apocalyptic number.

It is an amenable number.

255557629 is a deficient number, since it is larger than the sum of its proper divisors (1).

255557629 is an equidigital number, since it uses as much as digits as its factorization.

255557629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 945000, while the sum is 46.

The square root of 255557629 is about 15986.1699290355. The cubic root of 255557629 is about 634.5944702346.

The spelling of 255557629 in words is "two hundred fifty-five million, five hundred fifty-seven thousand, six hundred twenty-nine".