51255211 has 4 divisors (see below), whose sum is σ = 58577392. Its totient is φ = 43933032.

The previous prime is 51255173. The next prime is 51255227. The reversal of 51255211 is 11255215.

It is a happy number.

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 51255211 - 2⁹ = 51254699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255241) 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, 3661080 + ... + 3661093.

It is an arithmetic number, because the mean of its divisors is an integer number (14644348).

Almost surely, 2^51255211 is an apocalyptic number.

51255211 is a deficient number, since it is larger than the sum of its proper divisors (7322181).

51255211 is an equidigital number, since it uses as much as digits as its factorization.

51255211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7322180.

The product of its digits is 500, while the sum is 22.

The square root of 51255211 is about 7159.2744744143. The cubic root of 51255211 is about 371.4605310130.

The spelling of 51255211 in words is "fifty-one million, two hundred fifty-five thousand, two hundred eleven".