256300631 has 4 divisors (see below), whose sum is σ = 258696072. Its totient is φ = 253905192.

The previous prime is 256300607. The next prime is 256300643. The reversal of 256300631 is 136003652.

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 256300631 - 2⁶ = 256300567 is a prime.

It is a super-2 number, since 2×256300631² = 131380026901996322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256300631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256300831) 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, 1197560 + ... + 1197773.

It is an arithmetic number, because the mean of its divisors is an integer number (64674018).

Almost surely, 2^256300631 is an apocalyptic number.

256300631 is a deficient number, since it is larger than the sum of its proper divisors (2395441).

256300631 is a wasteful number, since it uses less digits than its factorization.

256300631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395440.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 256300631 is about 16009.3919622202. The cubic root of 256300631 is about 635.2088766625.

The spelling of 256300631 in words is "two hundred fifty-six million, three hundred thousand, six hundred thirty-one".