256477331 has 8 divisors (see below), whose sum is σ = 280422000. Its totient is φ = 232637440.

The previous prime is 256477297. The next prime is 256477339. The reversal of 256477331 is 133774652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256477331 - 2²² = 252283027 is a prime.

It is a super-2 number, since 2×256477331² = 131561242633767122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256477339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21026 + ... + 30903.

It is an arithmetic number, because the mean of its divisors is an integer number (35052750).

Almost surely, 2^256477331 is an apocalyptic number.

256477331 is a deficient number, since it is larger than the sum of its proper divisors (23944669).

256477331 is a wasteful number, since it uses less digits than its factorization.

256477331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52389.

The product of its digits is 105840, while the sum is 38.

The square root of 256477331 is about 16014.9096469509. The cubic root of 256477331 is about 635.3548193705.

The spelling of 256477331 in words is "two hundred fifty-six million, four hundred seventy-seven thousand, three hundred thirty-one".