51538111 has 2 divisors, whose sum is σ = 51538112. Its totient is φ = 51538110.

The previous prime is 51538063. The next prime is 51538117. The reversal of 51538111 is 11183515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51538111 - 2⁹ = 51537599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51538117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25769055 + 25769056.

It is an arithmetic number, because the mean of its divisors is an integer number (25769056).

Almost surely, 2^51538111 is an apocalyptic number.

51538111 is a deficient number, since it is larger than the sum of its proper divisors (1).

51538111 is an equidigital number, since it uses as much as digits as its factorization.

51538111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 25.

The square root of 51538111 is about 7179.0048753292. The cubic root of 51538111 is about 372.1426953818.

The spelling of 51538111 in words is "fifty-one million, five hundred thirty-eight thousand, one hundred eleven".