51511366 has 16 divisors (see below), whose sum is σ = 81291600. Its totient is φ = 24444448.

The previous prime is 51511357. The next prime is 51511379. The reversal of 51511366 is 66311515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (5080725).

Almost surely, 2^51511366 is an apocalyptic number.

51511366 is a deficient number, since it is larger than the sum of its proper divisors (29780234).

51511366 is a wasteful number, since it uses less digits than its factorization.

51511366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15143.

The product of its digits is 2700, while the sum is 28.

The square root of 51511366 is about 7177.1419102593. The cubic root of 51511366 is about 372.0783114509.

It can be divided in two parts, 515 and 11366, that added together give a square (11881 = 109²).

The spelling of 51511366 in words is "fifty-one million, five hundred eleven thousand, three hundred sixty-six".