51451911 has 36 divisors (see below), whose sum is σ = 91552032. Its totient is φ = 27667584.

The previous prime is 51451889. The next prime is 51451921. The reversal of 51451911 is 11915415.

It is not a de Polignac number, because 51451911 - 2¹⁰ = 51450887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451921) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4066 + ... + 10928.

It is an arithmetic number, because the mean of its divisors is an integer number (2543112).

Almost surely, 2^51451911 is an apocalyptic number.

51451911 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51451911 is a deficient number, since it is larger than the sum of its proper divisors (40100121).

51451911 is a wasteful number, since it uses less digits than its factorization.

51451911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900 (or 6890 counting only the distinct ones).

The product of its digits is 900, while the sum is 27.

The square root of 51451911 is about 7172.9987452947. The cubic root of 51451911 is about 371.9351040107.

It can be divided in two parts, 5145 and 1911, that added together give a square (7056 = 84²).

The spelling of 51451911 in words is "fifty-one million, four hundred fifty-one thousand, nine hundred eleven".