55211137 has 4 divisors (see below), whose sum is σ = 55614276. Its totient is φ = 54808000.

The previous prime is 55211111. The next prime is 55211153. The reversal of 55211137 is 73111255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24641296 + 30569841 = 4964^2 + 5529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55211137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55211237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201364 + ... + 201637.

It is an arithmetic number, because the mean of its divisors is an integer number (13903569).

Almost surely, 2^55211137 is an apocalyptic number.

It is an amenable number.

55211137 is a deficient number, since it is larger than the sum of its proper divisors (403139).

55211137 is a wasteful number, since it uses less digits than its factorization.

55211137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403138.

The product of its digits is 1050, while the sum is 25.

The square root of 55211137 is about 7430.4197055079. The cubic root of 55211137 is about 380.7812574081.

The spelling of 55211137 in words is "fifty-five million, two hundred eleven thousand, one hundred thirty-seven".