51400111 has 16 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 41564448.

The previous prime is 51400091. The next prime is 51400121. The reversal of 51400111 is 11100415.

51400111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51400111 - 2⁵ = 51400079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51400091 and 51400100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51400121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38310 + ... + 39628.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^51400111 is an apocalyptic number.

51400111 is a deficient number, since it is larger than the sum of its proper divisors (10692689).

51400111 is a wasteful number, since it uses less digits than its factorization.

51400111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 51400111 is about 7169.3870728257. The cubic root of 51400111 is about 371.8102449779.

Adding to 51400111 its reverse (11100415), we get a palindrome (62500526).

The spelling of 51400111 in words is "fifty-one million, four hundred thousand, one hundred eleven".