51548778 has 32 divisors (see below), whose sum is σ = 115214400. Its totient is φ = 17083728.

The previous prime is 51548759. The next prime is 51548779. The reversal of 51548778 is 87784515.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51548779) 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 in 15 ways as a sum of consecutive naturals, for example, 7000 + ... + 12332.

It is an arithmetic number, because the mean of its divisors is an integer number (3600450).

Almost surely, 2^51548778 is an apocalyptic number.

51548778 is an abundant number, since it is smaller than the sum of its proper divisors (63665622).

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

51548778 is a wasteful number, since it uses less digits than its factorization.

51548778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5523 (or 5517 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 51548778 is about 7179.7477671573. The cubic root of 51548778 is about 372.1683681135.

It can be divided in two parts, 51548 and 778, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 51548778 in words is "fifty-one million, five hundred forty-eight thousand, seven hundred seventy-eight".