51000620 has 24 divisors (see below), whose sum is σ = 116838288. Its totient is φ = 18545600.

The previous prime is 51000619. The next prime is 51000641. The reversal of 51000620 is 2600015.

It is a junction number, because it is equal to n+sod(n) for n = 51000595 and 51000604.

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 7 ways as a sum of consecutive naturals, for example, 115691 + ... + 116130.

It is an arithmetic number, because the mean of its divisors is an integer number (4868262).

Almost surely, 2^51000620 is an apocalyptic number.

It is an amenable number.

51000620 is an abundant number, since it is smaller than the sum of its proper divisors (65837668).

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

51000620 is a wasteful number, since it uses less digits than its factorization.

51000620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231841 (or 231839 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51000620 is about 7141.4718370935. The cubic root of 51000620 is about 370.8444796829.

Adding to 51000620 its reverse (2600015), we get a palindrome (53600635).

The spelling of 51000620 in words is "fifty-one million, six hundred twenty", and thus it is an aban number.