256073213 has 8 divisors (see below), whose sum is σ = 285849696. Its totient is φ = 227379600.

The previous prime is 256073201. The next prime is 256073239. The reversal of 256073213 is 312370652.

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 256073213 - 2¹⁰ = 256072189 is a prime.

It is a super-2 number, since 2×256073213² = 131146980832286738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256075213) 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 7 ways as a sum of consecutive naturals, for example, 270218 + ... + 271163.

It is an arithmetic number, because the mean of its divisors is an integer number (35731212).

Almost surely, 2^256073213 is an apocalyptic number.

It is an amenable number.

256073213 is a deficient number, since it is larger than the sum of its proper divisors (29776483).

256073213 is a wasteful number, since it uses less digits than its factorization.

256073213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541435.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 256073213 is about 16002.2877426948. The cubic root of 256073213 is about 635.0209454310.

The spelling of 256073213 in words is "two hundred fifty-six million, seventy-three thousand, two hundred thirteen".