256151471 has 2 divisors, whose sum is σ = 256151472. Its totient is φ = 256151470.

The previous prime is 256151459. The next prime is 256151501. The reversal of 256151471 is 174151652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256151471 is a prime.

It is a super-3 number, since 3×256151471³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256151411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128075735 + 128075736.

It is an arithmetic number, because the mean of its divisors is an integer number (128075736).

Almost surely, 2^256151471 is an apocalyptic number.

256151471 is a deficient number, since it is larger than the sum of its proper divisors (1).

256151471 is an equidigital number, since it uses as much as digits as its factorization.

256151471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 256151471 is about 16004.7327687781. The cubic root of 256151471 is about 635.0856279841.

The spelling of 256151471 in words is "two hundred fifty-six million, one hundred fifty-one thousand, four hundred seventy-one".