256413218 has 8 divisors (see below), whose sum is σ = 385070160. Its totient is φ = 128056500.

The previous prime is 256413197. The next prime is 256413229. The reversal of 256413218 is 812314652.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72908 + ... + 76343.

It is an arithmetic number, because the mean of its divisors is an integer number (48133770).

Almost surely, 2^256413218 is an apocalyptic number.

256413218 is a deficient number, since it is larger than the sum of its proper divisors (128656942).

256413218 is a wasteful number, since it uses less digits than its factorization.

256413218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150112.

The product of its digits is 11520, while the sum is 32.

The square root of 256413218 is about 16012.9078558518. The cubic root of 256413218 is about 635.3018739528.

The spelling of 256413218 in words is "two hundred fifty-six million, four hundred thirteen thousand, two hundred eighteen".