256212130 has 16 divisors (see below), whose sum is σ = 465414840. Its totient is φ = 101544192.

The previous prime is 256212113. The next prime is 256212137. The reversal of 256212130 is 31212652.

It can be written as a sum of positive squares in 4 ways, for example, as 195356529 + 60855601 = 13977^2 + 7801^2 .

It is not an unprimeable number, because it can be changed into a prime (256212137) 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, 116439 + ... + 118618.

Almost surely, 2^256212130 is an apocalyptic number.

256212130 is a deficient number, since it is larger than the sum of its proper divisors (209202710).

256212130 is a wasteful number, since it uses less digits than its factorization.

256212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235173.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 256212130 is about 16006.6276898040. The cubic root of 256212130 is about 635.1357553800.

Adding to 256212130 its reverse (31212652), we get a palindrome (287424782).

The spelling of 256212130 in words is "two hundred fifty-six million, two hundred twelve thousand, one hundred thirty".