256054813 has 4 divisors (see below), whose sum is σ = 292634080. Its totient is φ = 219475548.

The previous prime is 256054793. The next prime is 256054853. The reversal of 256054813 is 318450652.

256054813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256054813 - 2¹³ = 256046621 is a prime.

It is a super-3 number, since 3×256054813³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256054853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18289623 + ... + 18289636.

It is an arithmetic number, because the mean of its divisors is an integer number (73158520).

Almost surely, 2^256054813 is an apocalyptic number.

It is an amenable number.

256054813 is a deficient number, since it is larger than the sum of its proper divisors (36579267).

256054813 is an equidigital number, since it uses as much as digits as its factorization.

256054813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36579266.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 256054813 is about 16001.7128145708. The cubic root of 256054813 is about 635.0057353730.

The spelling of 256054813 in words is "two hundred fifty-six million, fifty-four thousand, eight hundred thirteen".