255720556 has 24 divisors (see below), whose sum is σ = 550783520. Its totient is φ = 101164032.

The previous prime is 255720547. The next prime is 255720559. The reversal of 255720556 is 655027552.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (255720559) 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 in 7 ways as a sum of consecutive naturals, for example, 350901 + ... + 351628.

Almost surely, 2^255720556 is an apocalyptic number.

255720556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

255720556 is an abundant number, since it is smaller than the sum of its proper divisors (295062964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255720556 is a wasteful number, since it uses less digits than its factorization.

255720556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702553 (or 702551 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 255720556 is about 15991.2649906128. The cubic root of 255720556 is about 634.7293003697.

The spelling of 255720556 in words is "two hundred fifty-five million, seven hundred twenty thousand, five hundred fifty-six".