256264451 has 4 divisors (see below), whose sum is σ = 258532392. Its totient is φ = 253996512.

The previous prime is 256264441. The next prime is 256264453. The reversal of 256264451 is 154462652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256264451 - 2²⁶ = 189155587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256264453) 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, 1133801 + ... + 1134026.

It is an arithmetic number, because the mean of its divisors is an integer number (64633098).

Almost surely, 2^256264451 is an apocalyptic number.

256264451 is a deficient number, since it is larger than the sum of its proper divisors (2267941).

256264451 is a wasteful number, since it uses less digits than its factorization.

256264451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267940.

The product of its digits is 57600, while the sum is 35.

The square root of 256264451 is about 16008.2619606252. The cubic root of 256264451 is about 635.1789860629.

The spelling of 256264451 in words is "two hundred fifty-six million, two hundred sixty-four thousand, four hundred fifty-one".