256433055 has 16 divisors (see below), whose sum is σ = 412090080. Its totient is φ = 136165248.

The previous prime is 256433039. The next prime is 256433059. The reversal of 256433055 is 550334652.

It is not a de Polignac number, because 256433055 - 2⁴ = 256433039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256433059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33892 + ... + 40761.

It is an arithmetic number, because the mean of its divisors is an integer number (25755630).

Almost surely, 2^256433055 is an apocalyptic number.

256433055 is a deficient number, since it is larger than the sum of its proper divisors (155657025).

256433055 is a wasteful number, since it uses less digits than its factorization.

256433055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74890.

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 256433055 is about 16013.5272504218. The cubic root of 256433055 is about 635.3182565694.

The spelling of 256433055 in words is "two hundred fifty-six million, four hundred thirty-three thousand, fifty-five".