256523252 has 6 divisors (see below), whose sum is σ = 448915698. Its totient is φ = 128261624.

The previous prime is 256523231. The next prime is 256523261. The reversal of 256523252 is 252325652.

It can be written as a sum of positive squares in only one way, i.e., 191656336 + 64866916 = 13844^2 + 8054^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32065403 + ... + 32065410.

It is an arithmetic number, because the mean of its divisors is an integer number (74819283).

Almost surely, 2^256523252 is an apocalyptic number.

It is an amenable number.

256523252 is a deficient number, since it is larger than the sum of its proper divisors (192392446).

256523252 is a wasteful number, since it uses less digits than its factorization.

256523252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64130817 (or 64130815 counting only the distinct ones).

The product of its digits is 36000, while the sum is 32.

The square root of 256523252 is about 16016.3432780395. The cubic root of 256523252 is about 635.3927361556.

The spelling of 256523252 in words is "two hundred fifty-six million, five hundred twenty-three thousand, two hundred fifty-two".