256047465 has 8 divisors (see below), whose sum is σ = 409675968. Its totient is φ = 136558640.

The previous prime is 256047461. The next prime is 256047509. The reversal of 256047465 is 564740652.

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

It is not a de Polignac number, because 256047465 - 2² = 256047461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256047461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8534901 + ... + 8534930.

It is an arithmetic number, because the mean of its divisors is an integer number (51209496).

Almost surely, 2^256047465 is an apocalyptic number.

It is an amenable number.

256047465 is a deficient number, since it is larger than the sum of its proper divisors (153628503).

256047465 is a wasteful number, since it uses less digits than its factorization.

256047465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17069839.

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 256047465 is about 16001.4832125025. The cubic root of 256047465 is about 634.9996610658. Note that the first 3 decimals are identical.

The spelling of 256047465 in words is "two hundred fifty-six million, forty-seven thousand, four hundred sixty-five".