256967651 has 2 divisors, whose sum is σ = 256967652. Its totient is φ = 256967650.

The previous prime is 256967621. The next prime is 256967663. The reversal of 256967651 is 156769652.

It is a happy number.

256967651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256967651 - 2¹⁴ = 256951267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256967596 and 256967605.

It is not a weakly prime, because it can be changed into another prime (256967621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128483825 + 128483826.

It is an arithmetic number, because the mean of its divisors is an integer number (128483826).

Almost surely, 2^256967651 is an apocalyptic number.

256967651 is a deficient number, since it is larger than the sum of its proper divisors (1).

256967651 is an equidigital number, since it uses as much as digits as its factorization.

256967651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 256967651 is about 16030.2105725408. The cubic root of 256967651 is about 635.7594410498.

The spelling of 256967651 in words is "two hundred fifty-six million, nine hundred sixty-seven thousand, six hundred fifty-one".