51016780 has 48 divisors (see below), whose sum is σ = 110172384. Its totient is φ = 19837440.

The previous prime is 51016759. The next prime is 51016781. The reversal of 51016780 is 8761015.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51016781) 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, 120970 + ... + 121390.

It is an arithmetic number, because the mean of its divisors is an integer number (2295258).

Almost surely, 2^51016780 is an apocalyptic number.

It is an amenable number.

51016780 is an abundant number, since it is smaller than the sum of its proper divisors (59155604).

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

51016780 is a wasteful number, since it uses less digits than its factorization.

51016780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 51016780 is about 7142.6031669133. The cubic root of 51016780 is about 370.8836440038.

Adding to 51016780 its reverse (8761015), we get a palindrome (59777795).

It can be divided in two parts, 5101 and 6780, that added together give a square (11881 = 109²).

The spelling of 51016780 in words is "fifty-one million, sixteen thousand, seven hundred eighty".