256212207 has 16 divisors (see below), whose sum is σ = 399552000. Its totient is φ = 161817912.

The previous prime is 256212137. The next prime is 256212223. The reversal of 256212207 is 702212652.

It is not a de Polignac number, because 256212207 - 2⁷ = 256212079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249207 + ... + 250232.

It is an arithmetic number, because the mean of its divisors is an integer number (24972000).

Almost surely, 2^256212207 is an apocalyptic number.

256212207 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

256212207 is a deficient number, since it is larger than the sum of its proper divisors (143339793).

256212207 is a wasteful number, since it uses less digits than its factorization.

256212207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499467 (or 499461 counting only the distinct ones).

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

The square root of 256212207 is about 16006.6300950575. The cubic root of 256212207 is about 635.1358190062.

Adding to 256212207 its reverse (702212652), we get a palindrome (958424859).

The spelling of 256212207 in words is "two hundred fifty-six million, two hundred twelve thousand, two hundred seven".