255501563 has 4 divisors (see below), whose sum is σ = 258735840. Its totient is φ = 252267288.

The previous prime is 255501553. The next prime is 255501583. The reversal of 255501563 is 365105552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255501563 - 2¹² = 255497467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255501553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617020 + ... + 1617177.

It is an arithmetic number, because the mean of its divisors is an integer number (64683960).

Almost surely, 2^255501563 is an apocalyptic number.

255501563 is a deficient number, since it is larger than the sum of its proper divisors (3234277).

255501563 is an equidigital number, since it uses as much as digits as its factorization.

255501563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234276.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 255501563 is about 15984.4162545900. The cubic root of 255501563 is about 634.5480595993.

The spelling of 255501563 in words is "two hundred fifty-five million, five hundred one thousand, five hundred sixty-three".