51439111 has 2 divisors, whose sum is σ = 51439112. Its totient is φ = 51439110.

The previous prime is 51439081. The next prime is 51439147. The reversal of 51439111 is 11193415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51439111 - 2⁵ = 51439079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51439411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25719555 + 25719556.

It is an arithmetic number, because the mean of its divisors is an integer number (25719556).

Almost surely, 2^51439111 is an apocalyptic number.

51439111 is a deficient number, since it is larger than the sum of its proper divisors (1).

51439111 is an equidigital number, since it uses as much as digits as its factorization.

51439111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 51439111 is about 7172.1064548708. The cubic root of 51439111 is about 371.9042586117.

The spelling of 51439111 in words is "fifty-one million, four hundred thirty-nine thousand, one hundred eleven".