256353331 has 8 divisors (see below), whose sum is σ = 288076320. Its totient is φ = 226345152.

The previous prime is 256353329. The next prime is 256353337. The reversal of 256353331 is 133353652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256353331 - 2¹ = 256353329 is a prime.

It is a super-2 number, since 2×256353331² = 131434060629591122, 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 = 256353293 and 256353302.

It is not an unprimeable number, because it can be changed into a prime (256353337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428386 + ... + 428983.

It is an arithmetic number, because the mean of its divisors is an integer number (36009540).

Almost surely, 2^256353331 is an apocalyptic number.

256353331 is a deficient number, since it is larger than the sum of its proper divisors (31722989).

256353331 is a wasteful number, since it uses less digits than its factorization.

256353331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857405.

The product of its digits is 24300, while the sum is 31.

The square root of 256353331 is about 16011.0377864772. The cubic root of 256353331 is about 635.2524104527.

The spelling of 256353331 in words is "two hundred fifty-six million, three hundred fifty-three thousand, three hundred thirty-one".