51015020 has 24 divisors (see below), whose sum is σ = 122436384. Its totient is φ = 17490816.

The previous prime is 51015007. The next prime is 51015023. The reversal of 51015020 is 2051015.

51015020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 51014986 and 51015004.

It is not an unprimeable number, because it can be changed into a prime (51015023) 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 7 ways as a sum of consecutive naturals, for example, 182057 + ... + 182336.

It is an arithmetic number, because the mean of its divisors is an integer number (5101516).

Almost surely, 2^51015020 is an apocalyptic number.

It is an amenable number.

51015020 is an abundant number, since it is smaller than the sum of its proper divisors (71421364).

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

51015020 is a wasteful number, since it uses less digits than its factorization.

51015020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364409 (or 364407 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 51015020 is about 7142.4799614700. The cubic root of 51015020 is about 370.8793789841.

Adding to 51015020 its reverse (2051015), we get a palindrome (53066035).

The spelling of 51015020 in words is "fifty-one million, fifteen thousand, twenty".