255400553 has 4 divisors (see below), whose sum is σ = 255432660. Its totient is φ = 255368448.

The previous prime is 255400517. The next prime is 255400559. The reversal of 255400553 is 355004552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25938649 + 229461904 = 5093^2 + 15148^2 .

It is a cyclic number.

It is not a de Polignac number, because 255400553 - 2⁸ = 255400297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255400559) 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, 5753 + ... + 23321.

It is an arithmetic number, because the mean of its divisors is an integer number (63858165).

Almost surely, 2^255400553 is an apocalyptic number.

It is an amenable number.

255400553 is a deficient number, since it is larger than the sum of its proper divisors (32107).

255400553 is a wasteful number, since it uses less digits than its factorization.

255400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32106.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 255400553 is about 15981.2563023061. The cubic root of 255400553 is about 634.4644278241.

The spelling of 255400553 in words is "two hundred fifty-five million, four hundred thousand, five hundred fifty-three".