51100111 has 8 divisors (see below), whose sum is σ = 51537024. Its totient is φ = 50665560.

The previous prime is 51100057. The next prime is 51100157. The reversal of 51100111 is 11100115.

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

It is a cyclic number.

It is not a de Polignac number, because 51100111 - 2¹⁵ = 51067343 is a prime.

It is a super-2 number, since 2×51100111² = 5222442688424642, 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 (51104111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86760 + ... + 87346.

It is an arithmetic number, because the mean of its divisors is an integer number (6442128).

Almost surely, 2^51100111 is an apocalyptic number.

51100111 is a deficient number, since it is larger than the sum of its proper divisors (436913).

51100111 is a wasteful number, since it uses less digits than its factorization.

51100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181.

The product of its (nonzero) digits is 5, while the sum is 10.

The square root of 51100111 is about 7148.4341642069. The cubic root of 51100111 is about 371.0854684023.

Adding to 51100111 its reverse (11100115), we get a palindrome (62200226).

The spelling of 51100111 in words is "fifty-one million, one hundred thousand, one hundred eleven".