256054521 has 8 divisors (see below), whose sum is σ = 341678080. Its totient is φ = 170566992.

The previous prime is 256054511. The next prime is 256054523. The reversal of 256054521 is 125450652.

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

It is not a de Polignac number, because 256054521 - 2²⁶ = 188945657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256054523) 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, 29530 + ... + 37203.

It is an arithmetic number, because the mean of its divisors is an integer number (42709760).

Almost surely, 2^256054521 is an apocalyptic number.

It is an amenable number.

256054521 is a deficient number, since it is larger than the sum of its proper divisors (85623559).

256054521 is a wasteful number, since it uses less digits than its factorization.

256054521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68015.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 256054521 is about 16001.7036905450. The cubic root of 256054521 is about 635.0054939901.

The spelling of 256054521 in words is "two hundred fifty-six million, fifty-four thousand, five hundred twenty-one".