470256021 has 6 divisors (see below), whose sum is σ = 679258710. Its totient is φ = 313504008.

The previous prime is 470256011. The next prime is 470256037. The reversal of 470256021 is 120652074.

It can be written as a sum of positive squares in only one way, i.e., 434722500 + 35533521 = 20850^2 + 5961^2 .

It is not a de Polignac number, because 470256021 - 2¹⁵ = 470223253 is a prime.

It is a super-2 number, since 2×470256021² = 442281450573504882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (470256001) 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 5 ways as a sum of consecutive naturals, for example, 26125326 + ... + 26125343.

It is an arithmetic number, because the mean of its divisors is an integer number (113209785).

Almost surely, 2^470256021 is an apocalyptic number.

It is an amenable number.

470256021 is a deficient number, since it is larger than the sum of its proper divisors (209002689).

470256021 is a wasteful number, since it uses less digits than its factorization.

470256021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52250675 (or 52250672 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 470256021 is about 21685.3872688500. The cubic root of 470256021 is about 777.6391584472.

The spelling of 470256021 in words is "four hundred seventy million, two hundred fifty-six thousand, twenty-one".