255420331 has 4 divisors (see below), whose sum is σ = 255453064. Its totient is φ = 255387600.

The previous prime is 255420251. The next prime is 255420337. The reversal of 255420331 is 133024552.

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 is a cyclic number.

It is not a de Polignac number, because 255420331 - 2⁷ = 255420203 is a prime.

It is a super-2 number, since 2×255420331² = 130479090976299122, 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 = 255420296 and 255420305.

It is not an unprimeable number, because it can be changed into a prime (255420337) 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, 2896 + ... + 22786.

It is an arithmetic number, because the mean of its divisors is an integer number (63863266).

Almost surely, 2^255420331 is an apocalyptic number.

255420331 is a deficient number, since it is larger than the sum of its proper divisors (32733).

255420331 is a wasteful number, since it uses less digits than its factorization.

255420331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32732.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 255420331 is about 15981.8750777248. The cubic root of 255420331 is about 634.4808048619.

Adding to 255420331 its reverse (133024552), we get a palindrome (388444883).

The spelling of 255420331 in words is "two hundred fifty-five million, four hundred twenty thousand, three hundred thirty-one".