256435051 has 2 divisors, whose sum is σ = 256435052. Its totient is φ = 256435050.

The previous prime is 256435043. The next prime is 256435099. The reversal of 256435051 is 150534652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256435051 - 2³ = 256435043 is a prime.

It is equal to p_14011879 and since 256435051 and 14011879 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (256430051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128217525 + 128217526.

It is an arithmetic number, because the mean of its divisors is an integer number (128217526).

Almost surely, 2^256435051 is an apocalyptic number.

256435051 is a deficient number, since it is larger than the sum of its proper divisors (1).

256435051 is an equidigital number, since it uses as much as digits as its factorization.

256435051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 256435051 is about 16013.5895726099. The cubic root of 256435051 is about 635.3199049424.

The spelling of 256435051 in words is "two hundred fifty-six million, four hundred thirty-five thousand, fifty-one".