255355631 has 4 divisors (see below), whose sum is σ = 255401064. Its totient is φ = 255310200.

The previous prime is 255355621. The next prime is 255355673. The reversal of 255355631 is 136553552.

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 255355631 - 2¹⁰ = 255354607 is a prime.

It is a super-2 number, since 2×255355631² = 130412996566816322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255355591 and 255355600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255355621) 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, 12860 + ... + 26001.

It is an arithmetic number, because the mean of its divisors is an integer number (63850266).

Almost surely, 2^255355631 is an apocalyptic number.

255355631 is a deficient number, since it is larger than the sum of its proper divisors (45433).

255355631 is an equidigital number, since it uses as much as digits as its factorization.

255355631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432.

The product of its digits is 67500, while the sum is 35.

The square root of 255355631 is about 15979.8507815311. The cubic root of 255355631 is about 634.4272273275.

The spelling of 255355631 in words is "two hundred fifty-five million, three hundred fifty-five thousand, six hundred thirty-one".