51481768 has 16 divisors (see below), whose sum is σ = 103953780. Its totient is φ = 23760768.

The previous prime is 51481753. The next prime is 51481823. The reversal of 51481768 is 86718415.

It can be written as a sum of positive squares in 2 ways, for example, as 35784324 + 15697444 = 5982^2 + 3962^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51481768.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247405 + ... + 247612.

Almost surely, 2^51481768 is an apocalyptic number.

It is an amenable number.

51481768 is an abundant number, since it is smaller than the sum of its proper divisors (52472012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51481768 is a wasteful number, since it uses less digits than its factorization.

51481768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495036 (or 495032 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 51481768 is about 7175.0796511258. The cubic root of 51481768 is about 372.0070334354.

The spelling of 51481768 in words is "fifty-one million, four hundred eighty-one thousand, seven hundred sixty-eight".