256673143 has 2 divisors, whose sum is σ = 256673144. Its totient is φ = 256673142.

The previous prime is 256673119. The next prime is 256673167. The reversal of 256673143 is 341376652.

It is a balanced prime because it is at equal distance from previous prime (256673119) and next prime (256673167).

It is a cyclic number.

It is not a de Polignac number, because 256673143 - 2⁵ = 256673111 is a prime.

It is a super-2 number, since 2×256673143² = 131762204674996898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256673173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128336571 + 128336572.

It is an arithmetic number, because the mean of its divisors is an integer number (128336572).

Almost surely, 2^256673143 is an apocalyptic number.

256673143 is a deficient number, since it is larger than the sum of its proper divisors (1).

256673143 is an equidigital number, since it uses as much as digits as its factorization.

256673143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 256673143 is about 16021.0219087298. The cubic root of 256673143 is about 635.5164690698.

The spelling of 256673143 in words is "two hundred fifty-six million, six hundred seventy-three thousand, one hundred forty-three".