256214553111 has 48 divisors (see below), whose sum is σ = 420024084480. Its totient is φ = 154784934720.

The previous prime is 256214553079. The next prime is 256214553113. The reversal of 256214553111 is 111355412652.

256214553111 is a `hidden beast` number, since 2 + 56 + 21 + 45 + 531 + 11 = 666.

It is not a de Polignac number, because 256214553111 - 2⁵ = 256214553079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256214553113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683530 + ... + 989768.

It is an arithmetic number, because the mean of its divisors is an integer number (8750501760).

Almost surely, 2^256214553111 is an apocalyptic number.

256214553111 is a deficient number, since it is larger than the sum of its proper divisors (163809531369).

256214553111 is a wasteful number, since it uses less digits than its factorization.

256214553111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306578 (or 306566 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

Adding to 256214553111 its reverse (111355412652), we get a palindrome (367569965763).

The spelling of 256214553111 in words is "two hundred fifty-six billion, two hundred fourteen million, five hundred fifty-three thousand, one hundred eleven".