51026820 has 48 divisors (see below), whose sum is σ = 153867840. Its totient is φ = 12560256.

The previous prime is 51026813. The next prime is 51026839. The reversal of 51026820 is 2862015.

It is an unprimeable number.

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, 31930 + ... + 33489.

It is an arithmetic number, because the mean of its divisors is an integer number (3205580).

Almost surely, 2^51026820 is an apocalyptic number.

It is an amenable number.

51026820 is an abundant number, since it is smaller than the sum of its proper divisors (102841020).

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

51026820 is a wasteful number, since it uses less digits than its factorization.

51026820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65444 (or 65442 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51026820 is about 7143.3059573282. The cubic root of 51026820 is about 370.9079721271.

Adding to 51026820 its reverse (2862015), we get a palindrome (53888835).

The spelling of 51026820 in words is "fifty-one million, twenty-six thousand, eight hundred twenty".