255544421225 has 6 divisors (see below), whose sum is σ = 316875082350. Its totient is φ = 204435536960.

The previous prime is 255544421221. The next prime is 255544421269. The reversal of 255544421225 is 522124445552.

It can be written as a sum of positive squares in 3 ways, for example, as 2779820176 + 252764601049 = 52724^2 + 502757^2 .

It is not a de Polignac number, because 255544421225 - 2² = 255544421221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255544421221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5110888400 + ... + 5110888449.

It is an arithmetic number, because the mean of its divisors is an integer number (52812513725).

Almost surely, 2^255544421225 is an apocalyptic number.

255544421225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255544421225 is a deficient number, since it is larger than the sum of its proper divisors (61330661125).

255544421225 is a wasteful number, since it uses less digits than its factorization.

255544421225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221776859 (or 10221776854 counting only the distinct ones).

The product of its digits is 640000, while the sum is 41.

Adding to 255544421225 its reverse (522124445552), we get a palindrome (777668866777).

The spelling of 255544421225 in words is "two hundred fifty-five billion, five hundred forty-four million, four hundred twenty-one thousand, two hundred twenty-five".