256532351 has 2 divisors, whose sum is σ = 256532352. Its totient is φ = 256532350.

The previous prime is 256532321. The next prime is 256532371. The reversal of 256532351 is 153235652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256532351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256532321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128266175 + 128266176.

It is an arithmetic number, because the mean of its divisors is an integer number (128266176).

Almost surely, 2^256532351 is an apocalyptic number.

256532351 is a deficient number, since it is larger than the sum of its proper divisors (1).

256532351 is an equidigital number, since it uses as much as digits as its factorization.

256532351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 32.

The square root of 256532351 is about 16016.6273291227. The cubic root of 256532351 is about 635.4002486262.

The spelling of 256532351 in words is "two hundred fifty-six million, five hundred thirty-two thousand, three hundred fifty-one".