51105711 has 8 divisors (see below), whose sum is σ = 68843824. Its totient is φ = 33719040.

The previous prime is 51105707. The next prime is 51105731. The reversal of 51105711 is 11750115.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51105711 - 2² = 51105707 is a prime.

It is a super-2 number, since 2×51105711² = 5223587393631042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105731) 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 7 ways as a sum of consecutive naturals, for example, 87520 + ... + 88101.

It is an arithmetic number, because the mean of its divisors is an integer number (8605478).

Almost surely, 2^51105711 is an apocalyptic number.

51105711 is a deficient number, since it is larger than the sum of its proper divisors (17738113).

51105711 is a wasteful number, since it uses less digits than its factorization.

51105711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175721.

The product of its (nonzero) digits is 175, while the sum is 21.

The square root of 51105711 is about 7148.8258476480. The cubic root of 51105711 is about 371.0990235112.

Adding to 51105711 its reverse (11750115), we get a palindrome (62855826).

The spelling of 51105711 in words is "fifty-one million, one hundred five thousand, seven hundred eleven".