256415211 has 12 divisors (see below), whose sum is σ = 398868288. Its totient is φ = 157793904.

The previous prime is 256415209. The next prime is 256415227. The reversal of 256415211 is 112514652.

256415211 is a `hidden beast` number, since 2 + 5 + 641 + 5 + 2 + 11 = 666.

It is not a de Polignac number, because 256415211 - 2¹ = 256415209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256415251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1095675 + ... + 1095908.

It is an arithmetic number, because the mean of its divisors is an integer number (33239024).

Almost surely, 2^256415211 is an apocalyptic number.

256415211 is a deficient number, since it is larger than the sum of its proper divisors (142453077).

256415211 is a wasteful number, since it uses less digits than its factorization.

256415211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191602 (or 2191599 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 256415211 is about 16012.9700867765. The cubic root of 256415211 is about 635.3035199332.

Adding to 256415211 its reverse (112514652), we get a palindrome (368929863).

The spelling of 256415211 in words is "two hundred fifty-six million, four hundred fifteen thousand, two hundred eleven".