256142463 has 4 divisors (see below), whose sum is σ = 341523288. Its totient is φ = 170761640.

The previous prime is 256142441. The next prime is 256142489. The reversal of 256142463 is 364241652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256142463 - 2⁵ = 256142431 is a prime.

It is a super-2 number, since 2×256142463² = 131217922703412738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256142963) 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 in 3 ways as a sum of consecutive naturals, for example, 42690408 + ... + 42690413.

It is an arithmetic number, because the mean of its divisors is an integer number (85380822).

Almost surely, 2^256142463 is an apocalyptic number.

256142463 is a deficient number, since it is larger than the sum of its proper divisors (85380825).

256142463 is an equidigital number, since it uses as much as digits as its factorization.

256142463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85380824.

The product of its digits is 34560, while the sum is 33.

The square root of 256142463 is about 16004.4513495465. The cubic root of 256142463 is about 635.0781832765.

The spelling of 256142463 in words is "two hundred fifty-six million, one hundred forty-two thousand, four hundred sixty-three".