51119911 has 2 divisors, whose sum is σ = 51119912. Its totient is φ = 51119910.

The previous prime is 51119863. The next prime is 51119923. The reversal of 51119911 is 11991115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51119911 - 2¹¹ = 51117863 is a prime.

It is a super-2 number, since 2×51119911² = 5226490601295842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51119911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51119951) 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, 25559955 + 25559956.

It is an arithmetic number, because the mean of its divisors is an integer number (25559956).

Almost surely, 2^51119911 is an apocalyptic number.

51119911 is a deficient number, since it is larger than the sum of its proper divisors (1).

51119911 is an equidigital number, since it uses as much as digits as its factorization.

51119911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405, while the sum is 28.

The square root of 51119911 is about 7149.8189487567. The cubic root of 51119911 is about 371.1333909563.

The spelling of 51119911 in words is "fifty-one million, one hundred nineteen thousand, nine hundred eleven".