255310031 has 4 divisors (see below), whose sum is σ = 256126032. Its totient is φ = 254494032.

The previous prime is 255310021. The next prime is 255310037. The reversal of 255310031 is 130013552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255310031 is a prime.

It is a super-2 number, since 2×255310031² = 130366423858441922, 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 = 255309985 and 255310012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255310037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407531 + ... + 408156.

It is an arithmetic number, because the mean of its divisors is an integer number (64031508).

Almost surely, 2^255310031 is an apocalyptic number.

255310031 is a deficient number, since it is larger than the sum of its proper divisors (816001).

255310031 is an equidigital number, since it uses as much as digits as its factorization.

255310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816000.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 255310031 is about 15978.4239210255. The cubic root of 255310031 is about 634.3894609078.

Adding to 255310031 its reverse (130013552), we get a palindrome (385323583).

The spelling of 255310031 in words is "two hundred fifty-five million, three hundred ten thousand, thirty-one".