51065111 has 2 divisors, whose sum is σ = 51065112. Its totient is φ = 51065110.

The previous prime is 51065087. The next prime is 51065137. The reversal of 51065111 is 11156015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51065111 is a prime.

It is a super-2 number, since 2×51065111² = 5215291122884642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51065411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532555 + 25532556.

It is an arithmetic number, because the mean of its divisors is an integer number (25532556).

Almost surely, 2^51065111 is an apocalyptic number.

51065111 is a deficient number, since it is larger than the sum of its proper divisors (1).

51065111 is an equidigital number, since it uses as much as digits as its factorization.

51065111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 51065111 is about 7145.9856562968. The cubic root of 51065111 is about 371.0007265263. Note that the first 3 decimals are identical.

The spelling of 51065111 in words is "fifty-one million, sixty-five thousand, one hundred eleven".