256996451 has 8 divisors (see below), whose sum is σ = 270673680. Its totient is φ = 243334368.

The previous prime is 256996409. The next prime is 256996459. The reversal of 256996451 is 154699652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256996451 - 2⁶ = 256996387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256996396 and 256996405.

It is not an unprimeable number, because it can be changed into a prime (256996459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53105 + ... + 57741.

It is an arithmetic number, because the mean of its divisors is an integer number (33834210).

Almost surely, 2^256996451 is an apocalyptic number.

256996451 is a deficient number, since it is larger than the sum of its proper divisors (13677229).

256996451 is a wasteful number, since it uses less digits than its factorization.

256996451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573.

The product of its digits is 583200, while the sum is 47.

The square root of 256996451 is about 16031.1088512305. The cubic root of 256996451 is about 635.7831913647.

The spelling of 256996451 in words is "two hundred fifty-six million, nine hundred ninety-six thousand, four hundred fifty-one".