256032049 has 32 divisors (see below), whose sum is σ = 333428480. Its totient is φ = 190916352.

The previous prime is 256032047. The next prime is 256032083. The reversal of 256032049 is 940230652.

It is a cyclic number.

It is not a de Polignac number, because 256032049 - 2¹ = 256032047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256032049.

It is not an unprimeable number, because it can be changed into a prime (256032047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644719 + ... + 645115.

It is an arithmetic number, because the mean of its divisors is an integer number (10419640).

Almost surely, 2^256032049 is an apocalyptic number.

It is an amenable number.

256032049 is a deficient number, since it is larger than the sum of its proper divisors (77396431).

256032049 is a wasteful number, since it uses less digits than its factorization.

256032049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 256032049 is about 16001.0014999062. The cubic root of 256032049 is about 634.9869168776.

The spelling of 256032049 in words is "two hundred fifty-six million, thirty-two thousand, forty-nine".