255223520501 has 4 divisors (see below), whose sum is σ = 255791947500. Its totient is φ = 254655093504.

The previous prime is 255223520491. The next prime is 255223520509. The reversal of 255223520501 is 105025322552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 132023222500 + 123200298001 = 363350^2 + 350999^2 .

It is a cyclic number.

It is not a de Polignac number, because 255223520501 - 2¹⁰ = 255223519477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255223520509) 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, 284212826 + ... + 284213723.

It is an arithmetic number, because the mean of its divisors is an integer number (63947986875).

Almost surely, 2^255223520501 is an apocalyptic number.

It is an amenable number.

255223520501 is a deficient number, since it is larger than the sum of its proper divisors (568426999).

255223520501 is an equidigital number, since it uses as much as digits as its factorization.

255223520501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568426998.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 255223520501 in words is "two hundred fifty-five billion, two hundred twenty-three million, five hundred twenty thousand, five hundred one".