256611212 has 48 divisors (see below), whose sum is σ = 531250944. Its totient is φ = 106920000.

The previous prime is 256611203. The next prime is 256611221. The reversal of 256611212 is 212116652.

It is an interprime number because it is at equal distance from previous prime (256611203) and next prime (256611221).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84887 + ... + 87857.

It is an arithmetic number, because the mean of its divisors is an integer number (11067728).

Almost surely, 2^256611212 is an apocalyptic number.

256611212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256611212 is an abundant number, since it is smaller than the sum of its proper divisors (274639732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256611212 is a wasteful number, since it uses less digits than its factorization.

256611212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3148 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 256611212 is about 16019.0889878295. The cubic root of 256611212 is about 635.4653517409.

Adding to 256611212 its reverse (212116652), we get a palindrome (468727864).

The spelling of 256611212 in words is "two hundred fifty-six million, six hundred eleven thousand, two hundred twelve".