51111085 has 8 divisors (see below), whose sum is σ = 61401600. Its totient is φ = 40843344.

The previous prime is 51111031. The next prime is 51111089. The reversal of 51111085 is 58011115.

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 51111085 - 2¹³ = 51102893 is a prime.

It is a super-2 number, since 2×51111085² = 5224686019754450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111089) 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, 285 + ... + 10114.

It is an arithmetic number, because the mean of its divisors is an integer number (7675200).

Almost surely, 2^51111085 is an apocalyptic number.

It is an amenable number.

51111085 is a deficient number, since it is larger than the sum of its proper divisors (10290515).

51111085 is a wasteful number, since it uses less digits than its factorization.

51111085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11387.

The product of its (nonzero) digits is 200, while the sum is 22.

The square root of 51111085 is about 7149.2017036869. The cubic root of 51111085 is about 371.1120306437.

The spelling of 51111085 in words is "fifty-one million, one hundred eleven thousand, eighty-five".