51355111 has 4 divisors (see below), whose sum is σ = 51374152. Its totient is φ = 51336072.

The previous prime is 51355097. The next prime is 51355151. The reversal of 51355111 is 11155315.

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 51355111 - 2⁷ = 51354983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4641 + ... + 11146.

It is an arithmetic number, because the mean of its divisors is an integer number (12843538).

Almost surely, 2^51355111 is an apocalyptic number.

51355111 is a deficient number, since it is larger than the sum of its proper divisors (19041).

51355111 is a wasteful number, since it uses less digits than its factorization.

51355111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19040.

The product of its digits is 375, while the sum is 22.

The square root of 51355111 is about 7166.2480420371. The cubic root of 51355111 is about 371.7017085968.

The spelling of 51355111 in words is "fifty-one million, three hundred fifty-five thousand, one hundred eleven".