51508620 has 72 divisors (see below), whose sum is σ = 164477040. Its totient is φ = 13011840.

The previous prime is 51508607. The next prime is 51508627. The reversal of 51508620 is 2680515.

51508620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51508627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4111 + ... + 10950.

Almost surely, 2^51508620 is an apocalyptic number.

It is an amenable number.

51508620 is an abundant number, since it is smaller than the sum of its proper divisors (112968420).

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

51508620 is a wasteful number, since it uses less digits than its factorization.

51508620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15095 (or 15090 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51508620 is about 7176.9506059329. The cubic root of 51508620 is about 372.0716996725.

The spelling of 51508620 in words is "fifty-one million, five hundred eight thousand, six hundred twenty".