256330473 has 16 divisors (see below), whose sum is σ = 390875520. Its totient is φ = 146370816.

The previous prime is 256330453. The next prime is 256330513. The reversal of 256330473 is 374033652.

It is not a de Polignac number, because 256330473 - 2¹² = 256326377 is a prime.

It is a super-2 number, since 2×256330473² = 131410622776807458, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256330453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33883 + ... + 40751.

It is an arithmetic number, because the mean of its divisors is an integer number (24429720).

Almost surely, 2^256330473 is an apocalyptic number.

It is an amenable number.

256330473 is a deficient number, since it is larger than the sum of its proper divisors (134545047).

256330473 is a wasteful number, since it uses less digits than its factorization.

256330473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656.

The product of its (nonzero) digits is 45360, while the sum is 33.

The square root of 256330473 is about 16010.3239505014. The cubic root of 256330473 is about 635.2335289203.

The spelling of 256330473 in words is "two hundred fifty-six million, three hundred thirty thousand, four hundred seventy-three".