256240529 has 8 divisors (see below), whose sum is σ = 265816320. Its totient is φ = 246823200.

The previous prime is 256240519. The next prime is 256240547. The reversal of 256240529 is 925042652.

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 256240529 - 2⁸ = 256240273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256240519) 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, 36317 + ... + 42794.

It is an arithmetic number, because the mean of its divisors is an integer number (33227040).

Almost surely, 2^256240529 is an apocalyptic number.

It is an amenable number.

256240529 is a deficient number, since it is larger than the sum of its proper divisors (9575791).

256240529 is an equidigital number, since it uses as much as digits as its factorization.

256240529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79231.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 256240529 is about 16007.5147665089. The cubic root of 256240529 is about 635.1592210318.

The spelling of 256240529 in words is "two hundred fifty-six million, two hundred forty thousand, five hundred twenty-nine".