256452013 has 2 divisors, whose sum is σ = 256452014. Its totient is φ = 256452012.

The previous prime is 256451999. The next prime is 256452023. The reversal of 256452013 is 310254652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238795209 + 17656804 = 15453^2 + 4202^2 .

It is a cyclic number.

It is not a de Polignac number, because 256452013 - 2⁵ = 256451981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256452023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128226006 + 128226007.

It is an arithmetic number, because the mean of its divisors is an integer number (128226007).

Almost surely, 2^256452013 is an apocalyptic number.

It is an amenable number.

256452013 is a deficient number, since it is larger than the sum of its proper divisors (1).

256452013 is an equidigital number, since it uses as much as digits as its factorization.

256452013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 256452013 is about 16014.1191765267. The cubic root of 256452013 is about 635.3339124641. Note that the first 3 decimals are identical.

The spelling of 256452013 in words is "two hundred fifty-six million, four hundred fifty-two thousand, thirteen".