51511448 has 8 divisors (see below), whose sum is σ = 96583980. Its totient is φ = 25755720.

The previous prime is 51511417. The next prime is 51511459. The reversal of 51511448 is 84411515.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51511448.

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 as a sum of consecutive naturals, namely, 3219458 + ... + 3219473.

Almost surely, 2^51511448 is an apocalyptic number.

It is an amenable number.

51511448 is a deficient number, since it is larger than the sum of its proper divisors (45072532).

51511448 is a wasteful number, since it uses less digits than its factorization.

51511448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438937 (or 6438933 counting only the distinct ones).

The product of its digits is 3200, while the sum is 29.

The square root of 51511448 is about 7177.1476228374. The cubic root of 51511448 is about 372.0785088856.

The spelling of 51511448 in words is "fifty-one million, five hundred eleven thousand, four hundred forty-eight".