55400211 has 48 divisors (see below), whose sum is σ = 86857056. Its totient is φ = 33965568.

The previous prime is 55400203. The next prime is 55400243. The reversal of 55400211 is 11200455.

55400211 is a `hidden beast` number, since 55 + 400 + 211 = 666.

It is not a de Polignac number, because 55400211 - 2³ = 55400203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55400201) 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, 758871 + ... + 758943.

It is an arithmetic number, because the mean of its divisors is an integer number (1809522).

Almost surely, 2^55400211 is an apocalyptic number.

55400211 is a deficient number, since it is larger than the sum of its proper divisors (31456845).

55400211 is a wasteful number, since it uses less digits than its factorization.

55400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 55400211 is about 7443.1318005259. The cubic root of 55400211 is about 381.2154319281.

Adding to 55400211 its reverse (11200455), we get a palindrome (66600666).

It can be divided in two parts, 55400 and 211, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55400211 in words is "fifty-five million, four hundred thousand, two hundred eleven".