51105211 has 4 divisors (see below), whose sum is σ = 51215112. Its totient is φ = 50995312.

The previous prime is 51105167. The next prime is 51105239. The reversal of 51105211 is 11250115.

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

It is a cyclic number.

It is not a de Polignac number, because 51105211 - 2⁷ = 51105083 is a prime.

It is a super-2 number, since 2×51105211² = 5223485182709042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51105911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54250 + ... + 55183.

It is an arithmetic number, because the mean of its divisors is an integer number (12803778).

Almost surely, 2^51105211 is an apocalyptic number.

51105211 is a deficient number, since it is larger than the sum of its proper divisors (109901).

51105211 is a wasteful number, since it uses less digits than its factorization.

51105211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109900.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 51105211 is about 7148.7908767847. The cubic root of 51105211 is about 371.0978132739.

Adding to 51105211 its reverse (11250115), we get a palindrome (62355326).

The spelling of 51105211 in words is "fifty-one million, one hundred five thousand, two hundred eleven".